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Self-Guided iNaturalist Hike: Alviso Unit – *Volunteer Opportunity*

Saturday, June 4 @ 7:00 am - Sunday, June 5 @ 5:00 pm

| Free

Interested in a volunteer opportunity you can do this weekend!? Looking for an activity you can do safely on your own or with your own household?

Join us for a self-guided BioBlitz event in honor of National Trails Day on June 4th and World Environment Day on June 5th. The Alviso Unit of the Don Edwards San Francisco Bay National Wildlife Refuge is a great location for viewing local wildlife and checking out native plant species. By using the iNaturalist app, you can take pictures of plants and animals along the trail and have the app identify them for you!

Please register via Eventbrite here:

As the Mallard Slough Trail is closed around pond A16, we recommend doing your self-guided BioBlitz hike in our Butterfly Garden, on the Marsh View Trail, and on the New Chicago Marsh Trail (boardwalk).

New to iNaturalist? Follow this link for instructions for setting up your iNaturalist account and how to make observations via your smartphone: Once you create a username and password you are good to go out and explore the trail. To join our weekend project, please visit, or search for “National Trails Day & World Environment Day at Don Edwards SF Bay NWR: Alviso – Self-Guided” and join! This way all of your observations will make it into our project for the weekend.

Other Considerations:

– This is a completely self-guided volunteer opportunity and staff will not be on-site to assist. Please keep this in mind as you make your plans. It’s always good to practice responsible recreation and let someone know where you are going whenever you head out on the trail.
– For questions about volunteer hours, please email We will do our best to respond to all requests.
– The Refuge gates will close at 5pm; please park outside of the gate if you plan on being in the area after hours.
– We expect the weather to be warm and sunny, so we encourage everyone to wear sun protection like sunscreen, hats, and sunglasses and bring plenty of water and snacks! We also encourage you to wear comfortable and breathable clothes that are good for exploring the trails and bring layers in case it gets a bit windy.
– ADA-compliant parking spaces, trails, and restrooms are available on-site.
– Restrooms will be available on-site in the form of an ADA-compliant portable toilet and hand-washing station.

Driving Directions: We recommend using Google Maps and mapping to the “Environmental Education Center (EEC)” or 1751 Grand Blvd, Alviso, CA 95002.

– Please follow safety precautions and abide by CDC guidelines.

– For information on how you can help keep our watersheds and the Bay clean by preventing urban runoff pollution, visit:

This program is brought to you by the U.S Fish and Wildlife Service, the San Francisco Bay Wildlife Society (SFBWS), and the Santa Clara Valley Urban Runoff Pollution Prevention Program (SCVURPPP).

Image: A photo of a boardwalk over vegetation and water.


Saturday, June 4 @ 7:00 am
Sunday, June 5 @ 5:00 pm
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Olivia Poulos


Don Edwards San Francisco Bay National Wildlife Refuge
2 Marshlands Rd.
Fremont, CA 94555 United States
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