Make a Difference This Month at These Pollution-Prevention and Waste-Reduction Events!
MARCH 2026
We all play a part in preventing stormwater pollution. Here are some ways to get involved in March and help protect our local waterways! All events are free unless otherwise indicated.
Ongoing beach and community cleanups help protect the County’s waterways from stormwater pollution and can help preserve water quality for years to come. The County thanks the following beach and community cleanup event partners for their ongoing support in preventing stormwater pollution: I Love A Clean San Diego (ILACSD), Surfrider Foundation San Diego, San Diego Coastkeeper, San Diego River Park Foundation, Tijuana River National Estuarine Research Reserve (TRNERR), San Diego Canyonlands, San Dieguito River Park, Friends of Ruffin Canyon, Friends of Rose Creek, Friends of Famosa Slough, San Diego Bird Alliance, Escondido Creek Conservancy, Green Oceanside, California State Parks Foundation, ASCENDtials, Wildlife Jewels, South Bay Sustainable Communities Network, Nature Collective at San Elijo Lagoon, City of Carlsbad, Keep America Beautiful, and County of San Diego Parks and Recreation.
Now through July 4, 2026 – Keep America Beautiful Great American Cleanup – Learn more or pledge.
March 1
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10:15am to 11:30am – ASCENDtials Climate Cares Black’s Beach Cleanup Event. Learn more here.
March 3
March 4
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9am to 12pm – San Diego Bird Alliance Dune Defenders: California Least Tern Habitat Restoration - Mariner’s Point Nesting Preserve. Learn more or register.
March 5
March 6
March 7
March 8
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10:15am to 11:30am –ASCENDtials Climate Cares Beach Cleanup at Silver Strand Beach. Learn more here.
March 9
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9am to 11am – San Diego Coastkeeper World Wildlife Day Cleanup - Otay Valley Regional Park. Learn more.
March 10
March 11
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9am to 12pm – San Diego Bird Alliance Dune Defenders: California Least Tern Habitat Restoration - Mariner’s Point Nesting Preserve. Learn more or register.
March 12
March 13
March 14
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8:30am to 11:30am – City of Carlsbad Trail Cleanup – La Costa Glen Trail. Learn more.
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8:30am to 12:30pm – California State Parks Foundation Cuyamaca Rancho State Park Cleanup. Learn more or sign up.
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9am to 12pm – San Diego River Park Foundation Community River Clean-Up (location TBD). Learn more or sign up.
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9am to 11am – Friends of Famosa Slough Work Party. Learn more or RSVP.
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9am to 12pm – Escondido Creek Conservancy Monthly Shrub Club. Learn more or reserve a spot.
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9am to 12pm -- San Diego Bird Alliance Community Restoration - Mariner’s Point Nesting Preserve. Offered in partnership with SDG&E. Learn more or register.
March 15
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12:15pm to 1:30pm – ASCENDtials Climate Cares Coronado Route 75 Highway Cleanup Event. Learn more here and select ‘check availability’ button to sign up for March event.
March 17
March 18
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8am to 12pm – San Diego River Park Foundation Planting with Preserve Stewards at Eagle Peak Ranch. Learn more or sign up.
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9am to 12pm – San Diego Bird Alliance Dune Defenders: California Least Tern Habitat Restoration - Mariner’s Point Nesting Preserve. Learn more or register.
March 19
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8am to 10am – San Diego River Park Foundation Grant Park Community Stewards. Learn more or sign up.
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8:30am to 12:30pm – San Diego River Park Foundation Water Quality Monitoring: West County. Learn more or sign up.
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3pm to 5pm – ILACSD and Green Oceanside Stay Classy O’side: Lake Blvd. Street Sweep Cleanup. Learn more or register.
March 20
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8:30am to 12:30pm – San Diego River Park Foundation Water Quality Monitoring: East County. Learn more or sign up.
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9am to 11am – Agua Hedionda Lagoon Foundation Trail Cleanup Event - Garfield Street Trailhead/Hubbs Trail. Learn more or sign up.
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9am to 12pm – TRNERR Friday Stewardship Session for Long-term Volunteers. Learn more or sign up.
March 21
March 24
March 25
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9am to 12pm – San Diego Bird Alliance - Dune Defenders: California Least Tern Habitat Restoration - Mariner’s Point Nesting Preserve. Learn more or register.
March 26
March 27
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9am to 12pm – TRNERR Friday Stewardship Session for Long-term Volunteers. Learn more or sign up.
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9am to 12pm – San Diego Bird Alliance and Friends of Famosa Slough – Habitat Restoration and Maintenance. Learn more or register.
March 28
March 29
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10am to 12pm – County of San Diego Parks and Recreation – Otay Lakes County Park Cleanup & Beautification. Learn more.
March 31
Monthly/Ongoing or On Your Own Stormwater Pollution Prevention Events:
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Tuesdays and Fridays, 8am to 11am – San Diego River Park Foundation River Assessment Field Teams (RAFT). Learn more or sign up.
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Tuesdays and Fridays, 9am to 12pm – San Dieguito River Park Dust Devils Habitat and Trail Restoration Events – Inland and Coastal Trails. Learn more.
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Wednesdays and Saturdays, 8am to 11am – San Diego River Park Foundation River Rescue Cleanups. Learn more or sign up.
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San Diego Surfrider Foundation Ongoing Solo Cleanups. Learn more.
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Coastkeeper San Diego Six Cleanup Challenge, Flexible Dates/Times. Learn more and see the list of challenge sites.
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ILACSD Adopt-A-Beach/Adopt-A Canyon Program, Flexible Dates/Flexible Times – Adopt a beach or canyon and lead independent cleanups on your schedule. Learn more and adopt a location.
 County of San Diego – Waterscape Rebate Program Rainwater Harvesting Workshop – Valley Center – March 14, 10am – Rainwater Harvesting Workshops Are Back! The Waterscape Rebate Program will be hosting rainwater harvesting workshops throughout 2026. Learn how to capture rainwater and the ways it can lower your water bill. Residents of unincorporated San Diego County qualify for a FREE rain barrel. Site location: Valley Center Library, 29200 Cole Grade Road, Valley Center, 92082. Learn more or register.
University of California Agriculture and Natural Resources (UCANR) Master Gardeners of San Diego – The following events will be offered in March.
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March 1 through May 10, 10am to 4pm – Master Gardener Demonstration Gardens at Carlsbad Flower Fields ($$ entry fees vary) – Visitors are invited to explore the demonstration gardens and wander through themed garden beds while learning about sustainable gardening practices. Master Gardeners will be available for questions while working in the Gardens. Learn more.
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March 7, 9am to 3:30pm – Ask-A-Master Gardener Booth at Tomatomania! – Visit the Ask-A-Master-Gardener booth at Tomatomania! to get in-depth, science-based gardening advice. Offered in partnership with The Water Conservation Garden, where attendees can visit the beautiful and educational drought-tolerant garden, and shop for tomatoes amongst 85 varieties. Learn more.
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March 11, 11am to 1pm – Ask-A-Master Gardener Q&A Sessions - San Diego County Operations Center Demonstration Garden – Attend this monthly session to get science-based answers and practical advice from UCCE’s experts to Californians on topics such as integrated pest management, nutrition, and agricultural economics. Site location: San Diego County Operations Center, Suite 201, 9335 Hazard Way, San Diego. Learn more.
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March 21, 9am to 3pm – Spring Gardening with UC Master Gardeners – Attend this seminar and plant sale where you can attend a variety of workshops and gardening lighting talks, shop for plants, local produce and other items, get advice from Master Gardeners, and more. Children’s activities will also be available. Learn more.
Earth Discovery Institute Planting Events – Attend any of the following events focused on planting native plants to support native pollinators. Offered in partnership with the Resource Conservation District of Greater San Diego County.
University of California Cooperative Extension’s (UCCE) Integrated Pest Management (IPM) Program – The following events will be offered in March.
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March 3, 5pm to 7pm – Healthy Garden-Healthy Home Community Workshop - Growing Fresh Herbs for Cooking: Herb Garden Pests & Diseases – Learn how to grow herbs in containers, recognize common pests and plant diseases, and safely prevent and control pests and diseases. Site location: Spring Valley Library, 836 Kempton St, Spring Valley, CA 91977. Learn more or register.
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March 10, 9am to 4pm (ENGLISH); March 18, 9am to 4:30pm (SPANISH) – Pesticide Safety Zoom Workshop, Instructor Training (fee $300) – This workshop will qualify participants to train fieldworkers and pesticide handlers under California pesticide regulations. Learn more or register.
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March 19, 12pm to 1pm – Urban & Community Webinar Series – The Secret Life of Biopesticides – Learn a simple, practical introduction to biopesticides including what they are, how they’re discovered, and how they work. Then learn where to find them, and when and how to use them effectively in a home garden as part of a sustainable pest management approach. Learn more or register.
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Pest Insight Webinar Series – The following webinars will be offered to provide applied, scientific, and decision-based pest control information to pest control licensees.
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March 11, 8am to 12:30pm – Troubleshooting Pest Control ($40) – Attend for this half-day webinar aimed at structural pest management professionals, where you’ll learn about troubleshooting various pests, their biology, inspection techniques, and best management practices. Learn more or register.
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March 26, 12pm to 1pm – Banishing Pests from Multi-Unit Apartment Buildings: A Primer for Property Managers – Attend this free workshop to learn the basics of IPM for property managers and available resources such as video trainings, templates, policies, posters and other materials. Workshop content is based off a three-year collaboration between scientists, property managers, nonprofits and government agencies. Learn more or register.
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UC IPM Video Library – Visit this link for a variety of videos on pest management.
Preserve Calavera UC California Naturalist Certification Course – Tuesdays, March 3 through May 5, 2026, 5:30pm to 8:30pm; plus 4 mandatory Saturdays and 2 optional field trips ($300 fee) – Explore the unique ecology and natural history of coastal north San Diego County through this 40-hour course combining a science curriculum with guest lecturers, field trips, and project-based learning. Offered in collaboration with the Buena Vista Audubon. Site location for evening classes: Buena Vista Nature Center, Oceanside. Learn more or register.
Tomatomania! at The Water Conservation Garden – March 6 and 7, 9am to 3:30pm – Attend this 2-day event where over 85 varieties of rare and heirloom tomatoes will be showcased. Offered in partnership with The Water Conservation Garden, El Cajon. Explore the Garden’s six acres of native and drought tolerant plantings including many educational features. Learn more.
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March 7, 9am to 3:30pm – Ask-A-Master Gardener Booth at Tomatomania! – Visit the Ask-A-Master Gardener (San Diego) booth at Tomatomania! to get in-depth, science-based gardening advice. Offered in partnership with The Water Conservation Garden, where attendees can visit the beautiful and educational drought-tolerant garden, and shop for tomatoes amongst 85 varieties. Learn more.
The Water Conservation Garden – The following events will be offered in March. Sponsored by Otay and Helix Water Districts, Sweetwater Authority, Grossmont-Cuyamaca Community College District, and the County of San Diego Watershed Protection Program.
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Free 2026 County Waterwise Workshops: Join Master Gardener Richard Restuccia in leaning about water-efficient irrigation.
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March 7, 10am to 11am – Irrigation 101: How Much and How Often? – Learn how to determine your plants’ water needs, measure what your system delivers, and use that knowledge to program your controller effectively. This class is perfect for beginners. Learn more or register.
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March 28, 10am to 11am – Irrigation 102: How Long and How Much? Fine-Tuning Your System – Get a hands-on look at irrigation components and maintenance practices that keep your system running smoothly. Explore spray heads, rotors, drip irrigation, and valves, plus get on-site help adjusting heads, troubleshooting, and setting seasonal schedules. Learn more or register.
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March 13, 9am to 4pm – Free-Day Fridays – Attendees will receive free admission on the second Friday of every month. Activities include mini-tours, arts & crafts, community partner booths, scavenger hunts and prizes, and more. Learn more.
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March 28, 9am to 4pm – Monthly Water District Wave-In Day – On the last Saturday of every month, free admission to the Garden is offered to customers of supporting water districts for a day of learning about sustainable living and water-wise gardening. Enjoy workshops, community partner booths, and water-wise exhibits that help you improve your individual impact on the planet. Learn more or register.
Catching H2O – The following events will be offered in March. Site location: Terra Corazon, Valley Center, 1859 Mesa Verde Dr, Valley Center.
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March 7 and 8, 9am to 4pm – Pumps for Greywater and Rainwater Harvesting ($$ fees vary) – This 2-day unique course for both homeowners and contractors offers a deep dive into the design and installation of pumps for rainwater and greywater systems allowing you to apply what you learn to real-world rainwater and greywater projects. The course includes a mix of in-class discussion and hands-on installation and practice. Note: Optional events offered on March 5, 11 and 12. Learn more or register.
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March 14, 9am to 4pm – Water Resilience Symposium ($$ fees vary) – This symposium showcases practical programs and proven strategies that help landowners keep their land healthy, productive, and resilient in the face of drought. Connect with fellow landowners and local organizations to learn how water-smart projects are being implemented across the county. Explore real-world solutions and see water resiliency strategies in action through onsite demonstrations. Learn more or register.
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Alta Vista Botanical Garden – Kids in the Garden Classes – March 14, 10am to 12pm – ($5 fee, includes entry to the Garden) – Kids and their families are invited to attend Saturday classes featuring hands-on activities, incredible edibles, conservation lessons, and tours of the gardens. Topics vary by month with the March theme being Soil, Composting & Planting. Learn more or pre-register with Farmer Jones at farmerjonesavbg@gmail.com.
Landscape and Water-Savings Webinars – A series of landscape and water-savings webinars will be offered in March hosted by various regional water agencies. Dates and times vary. All events will be virtual and free unless otherwise noted.
The following topics will be hosted or co-hosted by Metropolitan Water District of Southern California (MWD). See calendar and learn more or register.
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California Friendly & Native Plant Landscape Training – Learn how to design a yard using the four principles of gorgeous and watershed-wise landscaping. Topics include building healthy soil, capturing rainwater, selecting climate-appropriate and native plants, and use of high-efficiency irrigation. In-person event offered in partnership with Vallecitos Water District & Vista Irrigation District. Site location: Vallecitos Water District.
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Transforming Lawns: A Sustainable Approach – Learn how to transform your yard into a beautiful, sustainable, and water-efficient landscape. Topics include selecting climate-appropriate plant palettes, planning a new landscape that thrives with less water, and exploring sustainable landscape techniques, functions, turf removal options and rebates. In-person event offered in partnership with Vallecitos Water District & Vista Irrigation District. Site location: Vallecitos Water District.
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Garden Design Workshop – Learn how to identify critical steps for successfully designing a watershed-wise landscape. Topics include creating a successful planting plan, developing a palette of climate-appropriate plants, and sizing and siting the rainwater capture area.
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Rain to Roots: Water for Your Garden – Learn how to use best management practices for capturing rainwater in the landscape using both passive and active methods. Topics include choosing the right rainwater capture method for your landscape, siting and sizing rain gardens for optimal performance, maintenance tips and troubleshooting common issues, and managing overflow to prevent erosion and flooding.
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Irrigation & Controller Basics: Smart Watering – Learn how to optimize water use, improve plant health, and reduce runoff by understanding the relationship between soil, water, and system performance. Topics include an overview and basics of irrigation systems, typical irrigation problems and troubleshooting, weather-based controllers, programming essentials, and more.
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Drip Irrigation: Maintenance & Troubleshooting – Learn how to keep your landscape thriving by making your drip irrigation system more efficient and reliable. Topics include understanding soil moisture balance, identifying key drip system components, reviewing common problems with drip systems and how to avoid them, and developing a successful maintenance routine.
The following topic will be hosted by California American Water. See calendar and learn more or register.
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Outdoor Leak Detection Saves Water – Learn how to detect if you have a leak and track down the source of the leak. You’ll also learn preventive measures to avoid potential leaks and whether to do-it-yourself or bring in a pro.
WaterSmart Residential Landscape and Irrigation Events – The San Diego County Water Authority’s WaterSmart Program is offering the following events in March.
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WaterSmart Landscape Contest – Entries accepted through May 8, 2026 – Participate in this annual competition that rewards water-efficient landscapes created by customers of participating water agencies. Be recognized for your work in water conservation and neighborhood beautification. Learn more.
- Past recordings of 3-Hour Landscape Workshops. View past workshops.
San Diego Botanic Garden – The following events will be offered in March
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Monthly SAPLinGS Sessions – Wednesdays, Thursdays, and Fridays in March, 10am to 12pm – Children are invited to join for Science, Art, and Play in Garden Spaces (SAPLinGS) activities. Topics vary by month and will focus on a different plant or nature-based theme. Science activities engage kids with cool hands-on learning that stimulates curiosity. Art activities focus on projects that spark the imagination. Learn more.
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Ongoing - Every Friday – Special Activity: Toddler Tales & Tunes in Hamilton Children’s Garden – 10:30am to 11am – Join Grandma Kathy as she uses puppets, bells, pompoms, and much more to connect children to plants and nature in the beautiful outdoor setting at the top deck of Hamilton Children’s Garden. Learn more.
 Living Coast Discovery Center – The following composting events will be offered in March.
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March 1, 8, 15, and 22, 11:30am to 12:30pm – Sunday Compost Workshops – Learn the basics on how to start your own compost pile by attending these on-site workshops. Pre-recorded Compost Workshop videos are also available. Sponsored by the City of Chula Vista. Learn more or sign up for the March 1st, 8th, 15th and 22nd
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March 29, 11:30am to 12:30pm – Vermicomposting Workshop – Learn how vermicomposting can convert waste into fertilizer for your garden, including how to build and care for your own worm bin and worms. Learn more or register.
South Bay Sustainable Communities Network – The following events will be offered in March.
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Compost Workshops – Workshop attendance is limited. Site location: 158 Vance Street, Chula Vista unless otherwise mentioned. Learn more or RSVP.
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March 1, 15, and 29, 8:30am – Hands-On Workshops – Learn how to turn and harvest a backyard compost system. Bring your food scraps!
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March 14, 8am to 12pm – Free Compost Pickup Event - Otay Landfill – Open to City of Chula Vista residents only. Offered in partnership with the City of Chula Vista and Republic Services.
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March 15, 1pm to 2:30pm – Community Workshops: Worm Compost 101 – Attend this workshop to set up your very own worm bin while learning how to take care of your worms, benefits of having a worm bin, and how to make worm tea. Learn more and sign up.
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Monthly Compost Pile Turnings – Various days, timeslots, and cities – Attend these monthly turnings of South Bay Sustainable Communities Network soil saver compost bins at select compost hub locations throughout South San Diego County. Compost hubs are also available to community members to drop off food scraps. Scroll to the bottom of home page to check calendar for hub locations and dates.
Solana Center for Environmental Innovation Waste Reduction Events – The following events will be offered in March.
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March 4, 6pm to 7pm – Introduction to Manure Composting Webinar – Learn how to save money and reduce pests by composting your livestock manure. Topics include the basics and benefits of composting, how to incorporate manure into compost piles, and tips to prevent odors and flies. You’ll also learn about local regulations and requirements, and more. Funded by the County of San Diego. Learn more or register.
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March 7, 10am to 11:30am – No-Turn Composting with ASPs – Ramona – This workshop will address how to use an Aerated Static Piles (ASPs) to compost manure, crop residues, and food scraps from small to medium-sized livestock farms or orchards. Topics include the best system for composting manure and other on-farm materials, managing pest and smell concerns with neighbors, and ensuring compliance with San Diego County ordinances. Funded by the County of San Diego. Site location and host: Ramona Library. Learn more or register.
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March 14, 21 and 28; April 4 and 11, 9am-12pm (plus April 18 field trip, 10am to 11am) – 5-Week Master Composter Course – Palomares House, Fallbrook ($25 refundable fee) – Through lectures, demonstrations, and a field trip, participants will learn how to expand their composting knowledge and sustainable gardening practices. Learn how to reduce your carbon footprint, methane emissions, and water use, while using compost to create amendments to your garden. Additional topics include the microbiology of composting, traditional composting and vermicomposting, Bokashi fermentation, and much more! Residents of unincorporated County of San Diego receive preferential registration. Funded by the County of San Diego. Site host and location: Palomares House & Park, Fallbrook. Learn more or register.
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March 22, 1pm to 4pm – 2026 Zero Waste Textile Expo – This event serves to educate the community about the impact of clothing and textile waste. Participants will learn about the urgent need to move towards more sustainable models in fashion, connect with sustainable vendors, and shop from local makers. Offered in partnership with San Diego Fix It Clinic which will be offered on site. Site host and location: Encinitas Community and Senior Center. Learn more or register.
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March 28, 10am to 12pm – All About Composting with Worms Workshop - Rancho Santa Fe – Learn about the benefits of vermicomposting (composting with worms) and turning food waste into a natural fertilizer for your plants. Topics include appropriate tools and materials, steps to start a vermicompost bin, how to feed your worms and which foods are suitable, and more. Funded by the County of San Diego. Site host and location: Rancho Santa Fe Library. Learn more or register.
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March 28, 11am to 12pm – How to Save Money and Compost Manure in Unincorporated San Diego County – Farmers, ranchers, and livestock owners are invited to learn about low-cost options to manage organic materials on their property and improve their existing operation. Topics include details of the County’s updated zoning and permitting requirements, the basics of manure composting, cost reductions, and other benefits. A tour of the International Equestrian Center’s manure composting windrows will also be provided. Funded by the County of San Diego. Site host and location: International Equestrian Center at San Diego Country Estates. Learn more or register.
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March 29, 10am to 11am – Rain Barrel & Water Harvesting Workshop for City of San Diego Residents – Learn about the benefits of rain barrels and best practices for rainwater collection at this workshop designed for City of San Diego residents. Topics include installation demonstration, downspout and rain chain connections, rain barrel maintenance and emptying practices, and rebates and discounts. Funded by Think Blue San Diego and the State Department of Water Resources. Site host and location: Mountain View Community Center, San Diego. Learn more or register for workshop and pre-order rain barrels.
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Household Hazardous Waste (HHW) Household Pickup Service ($10 fee for people under 65; free for people 65 and over) – A HHW pick-up service is being offered to residents in San Diego County. Accepted items include electronic waste, light bulbs and fluorescent tubes, batteries, fuel, smoke detectors, cleaning products, paint and more. 125 pounds or 15 gallons (whichever one comes first) can be picked up at one time. Call CleanEarth at 800-714-1195 to schedule a pickup and confirm what items are accepted. Learn more.
I Love a Clean San Diego – The following events will be offered in March.
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March 7, 8am to 12pm – Compost and Mulch Giveaway at Chollas Lake, Gloria’s Mesa Park – City of San Diego Residents – Attend to pick up some nutrient-rich compost for your garden at no cost. Offered in partnership with the City of San Diego Environmental Services Department. Site location: Chollas Lake Park, San Diego. Learn more or register.
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March 8, 10am to 12pm – City of Encinitas Clothing Swap – Attend for a day of swapping and zero waste! Let’s slow down the consumption of new items and recirculate our clothing back into our local community. Offered in partnership with the City of Encinitasand the Encinitas Library. Learn more.
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March 13, 11am to 1pm – Slow Down Swap Party at the ASCENDtial’s/City Heights Food Distribution – Attend this swap event to slow down our consumption and exchange some clothing and accessories. These will help divert fabrics from our local landfills and recirculate them back into the San Diego community. Offered in partnership with the City of San Diego Environmental Services Department. Site location: Officer Jeremy Henwood Park, San Diego. Learn more or register.
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March 14, 10am to 11am – From Kitchen to Closet: DIY Your Way to a Low-Waste Lifestyle Workshop – Attend to learn accessible ways to live a more sustainable lifestyle! This workshop will cover zero waste practices to adopt throughout the house, in the kitchen, sustainable product swaps, and recommendations for where to purchase low waste versions of everyday products locally. Attendees will also have the opportunity to make and take home DIY zero waste cleaning and personal care products. Sponsored by the City of San Diego Environmental Services Department. Site location: Origins Grocer, South Park. Learn more or register.
Zero Waste San Diego Fixit Clinics – Learn how to reduce waste by fixing things instead of throwing items away at the following Fix-It Clinics in March. Bring broken or non-working items for assessment, disassembly, and possible repair. Workspace, specialty tools, and guidance to help you take apart and troubleshoot your item will be provided. Clinics hosted by SD Fixit Clinic with the help of many other zero waste partners.
University of California Agriculture and Natural Resources – Ask a UC Master Food Preserver Live Q&A Webinar – March 11, 7pm to 8pm –– A panel of volunteers specializing in freezing, dehydrating, canning, and food safety will be available to answer your questions. They will also share their tips so you can safely and successfully preserve food at home. Learn more or register.
City of Chula Vista Free Compost Event – March 14, 8am to 12pm – Attend this free compost pick-up event for residents of Chula Vista. Offered in partnership with Republic Services. Learn more.
SD Environmental Services One-Day Collection Event - City of San Diego – March 14, 9am to 1pm – A household hazardous waste (HHW) collection event will be held at San Diego Miramar College, 10440 Black Mountain Road (parking lot 2), San Diego. Learn more.
Cities of La Mesa and Lemon Grove – Free Household Hazardous Waste Disposal Drive-Through Event – March 28, All Day (by appointment only – 9am to 12:45pm). Residents of the Cities of La Mesa and Lemon Grove can dispose of their household hazardous waste such as batteries, fluorescent bulbs, electronics, paints/solvents, and more. Learn more and schedule an appointment.
 Agua Hedionda Lagoon Foundation – The following events will be offered in March.
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Registration Open Now – 2026 Summer Discovery Camps - June through August ($$ fees vary) – Discovery Camps feature hands-on, educational lessons, and activities around a central theme designated for that camp week. All camps take place outdoors in our Nature Nodes, and are filled with nature walks, animal interactions, and crafts. Camp groups are split by age ranges and capped at 12 campers per group with 1 teacher. Camp is for children in kindergarten through 5th grade. Register early as camps fill up quickly. Learn more or register.
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March 13, 5pm to 9pm – Groove & Gamble Poker Night Fundraiser ($$ fees vary) – Join the Foundation for an exciting Texas Hold’em Poker Night with tables for both beginners and experienced players, set in a community-focused atmosphere with drinks and heavy appetizers. Your support helps strengthen their environmental education programs and expand impact in the community. Register soon as this event tends to sell out early. Learn more or register.
American Water Works Association - Microplastics 2026: State Regulatory Perspectives and Progress Webinar, March 4, 11am to 12:30pm Mountain Time ($$ fees vary) – Learn about the various states that have initiated proactive steps to understand the need for regulatory action. This webinar provides an update on these activities from three key state regulatory agencies. Note the time on the website is posted as Mountain Time. Learn more or register.
Escondido Creek Conservancy Welcome to the Watershed Series! – March 7, 9am to 12pm – Enjoy nature and learn about the work the Conservancy is doing to protect special places throughout the Escondido Creek Watershed. This free monthly activity could include a gentle nature or flower walk, hiking, biking, or nature photography. Learn more or reserve a spot.
San Diego Coastkeeper Watershed Watch - Mission Bay Water Quality Monitoring Program – Be part of a team of passionate individuals interested in protecting our waterways. Join San Diego Coastkeeper’s Mission Bay Water Quality Monitoring Program and participate in monthly field days to collect water samples at ten sites in Mission Bay. The following events will be offered in March.
Nature Collective at San Elijo Lagoon – The following events will be offered in March.
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March 7, 10am to 11:30am – Discovery Tour – Get a guided tour of the salt marsh, mudflats, and native plants of the San Elijo Lagoon. Learn more or reserve your spot.
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March 14, 9am to 11am – Wildlife Tour – Discover lots of waterfowl playing hide-and-seek with us among the lagoon waters. We may find mushrooms along the way. We will also visit four distinct plant communities at Harbaugh Seaside Trails. Learn more or reserve your spot.
Wildlife Jewels – Paint the Jewels of La Jolla Painting Event – March 7, 3:30pm to 6pm - Kellogg Park –Attend this free, family-friendly community celebration in honor of World Wildlife Day. Participate in a special artist-led painting experience of coastal wildlife art, local wildlife stories, and a short, guided walk along the beach as we learn about the “Jewels” of La Jolla—harbor seals, sea lions, coastal birds, and tidepool life. Learn more or register.
Buena Vista Audubon Kids’ Nature Clubhouse and Trail Exploration – March 8, 11am to 12:30pm – School-aged children and their families are invited to complete a nature-inspired craft and explore the lagoon trail with a different focus each month. The 1/2 hour trail adventure starts from the Nature Center at 11:30am. Learn more.
San Dieguito River Valley Conservancy – The following events will be offered in March.
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March 14, 4pm to 6:30pm – Paint the Jewels of the San Dieguito Lagoon ($7 fee) – Attend this golden hour painting event offered in partnership with Wildlife Jewels. Event includes an easy walk along the Coast to Crest Trail followed by painting session. Site location: Birdwing Open Air Classroom, 15737 San Andres Dr, Del Mar, CA 92014. Learn more or get tickets.
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March 27, 9am to 12pm – Monthly Walk and Talk at Five Oaks Trail, Volcan Mountain – Hear historic stories surrounding Volcan Mountain from Fred Grand of Descendants of Early San Diego. Site location: 1209 Farmer Road, Julian, CA. Learn more or reserve a spot.
Center for Watershed Protection – 2026 Webcast Series: Webcast 3 – Navigating MS4 Regulations – Compliance, Challenges, and Best Practices – March 18, 1pm to 2:30pm Eastern Time ($$ fees vary) – Learn about the permitting MS4 Phase II implementation of the City of Gaithersburg, Maryland. Topics include goals of the Phase II permits, compliance challenges, best practices, and lessons learned. Note the time on the website is posted as Eastern Time. Learn more or register.
Batiquitos Lagoon Foundation Docent-Led Lagoon Walks – The Kumeyaay Trail – March 21, 10am to 11:30am – Come along for strenuous, docent-led walk up a little-known trail where you will get a physical workout with fabulous views, history lesson, and environmental education. Learn more.
Tijuana River National Estuarine Research Reserve – Junior Rangers Program Ongoing Kids’ Educational Event – Saturdays 11am to 12pm – Kids ages 8 through 12 are invited to take part in discovering the rich heritage preserved in parks. They will participate in hands-on activities and can earn awards such as pins, certificates, and patches as they progress through the program! Learn more by clicking on the March 7th, 14th, 21st and 28th dates.
Living Coast Discovery Center – Sweetwater Safari Hike Series – Saturdays, 11:30am to 12pm – Join the Center every Saturday to explore the Sweetwater Marsh Trail on the San Diego Bay National Wildlife Refuge. Here you will learn about the history of the Marsh, salt marsh ecosystem, plants, and wildlife thriving in this protected space. Learn more or sign up for the March 7th, 14th, 21st, and 28th hikes.
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