Field Trips

Marin Audubon Society provides a full schedule of field trips to our members and the public.

Advance registration is required for most of our trips, nearly all which have size limits to prevent overcrowding. Registration on the MAS website’s Field Trips page will open ten days before the trip date. 

Trips can fill up quickly. Please register early to make sure you get a spot.

If you want to cancel a trip you registered for, contact newsletter@marinaudubon.org. If a trip is full, check back, even on the night before the trip, as cancellations will open new spots.

To support our field trips, other programs and conservation projects, we greatly appreciate your donations! A donation of $35 or more qualifies you for an annual membership at Marin Audubon Society! **New Members Only

Become a Chapter Supporting Member of the Marin Audubon Society starting at $35 a year, or RENEW your membership today! Your membership helps to fund important efforts such as our ongoing habitat restoration projects, the Monarch Rescue Project, our Northern Spotted Owl Outreach program, and of course our monthly field trips and speaker series! We cannot do these important projects, along with our many other efforts, without the support of our dedicated members!

Events

Today

  • The Ponds at the Las Gallinas Valley Sanitary District (LGVSD) – San Rafael

    Thursday, June 4, 2026 8:30 AM to noon Birding with Mark Clark Registration is not required. All participants are welcome to join this trip. We welcome bird enthusiasts of all levels, especially beginning birders, to join leader Mark Clark on our monthly walk around the ponds at Las Gallinas.  On our search we’ll be looking for waterfowl, waders, songbirds, raptors and swallows. We are likely to spot some interesting species, so come assist in our search. The packed dirt paths around the ponds are wide, flat and easy to navigate. Heavy rain cancels. DIRECTIONS: From Hwy 101, exit at Smith Ranch Rd. Drive east on Smith Ranch Rd. toward McInnis Park. Turn left immediately after crossing the railroad tracks and drive about 0.5 mile through the LGVSD gates and into the parking lot at the end of the road. Meet the group by the bridge just past the parking lot. There is a portable restroon in the parking area for public use.

  • Rodeo Lagoon – Marin Headlands

    Marin Audubon Hosts Field Trips for California Bird Atlas BIG WEEKEND. California Bird Atlas Big Weekend is a four-day statewide celebration of birds and the new California Bird Atlas – featuring dozens of field trips, and a collective mission to document as many species breeding in as many blocks as possible.

    Field trips introduce Atlas basics in the field, with leaders showing how to contribute. The goal is to make it easy for first-time participants to get involved and continue contributing beyond the weekend.

    Marin Audubon is sponsoring the following field trip for the CBA Big Weekend:

    Rodeo Lagoon, Marin Headlands
    Friday, June 5, 2026
    7:30 AM to 12:00 PM
    Birding with William Legge and David Wiechers

    Registration is required for this trip. Registration opens on Tuesday, May 26 at 8AM
    Limit of 15 participants for this trip.

    The primary focus of this Field Trip will be seeking out and documenting breeding birds for the California Bird Atlas (CBA). Join us for a Sea Watch at 7:30 AM or arrive later at 8:00 AM for an expanded circuit of the lagoon to include trails that are rarely birded.
    READ MORE

  • San Geronimo Community Center environs

    Marin Audubon Hosts Field Trips for California Bird Atlas BIG WEEKEND. California Bird Atlas Big Weekend is a four-day statewide celebration of birds and the new California Bird Atlas – featuring dozens of field trips, and a collective mission to document as many species breeding in as many blocks as possible.

    Field trips introduce Atlas basics in the field, with leaders showing how to contribute. The goal is to make it easy for first-time participants to get involved and continue contributing beyond the weekend.

    Marin Audubon is sponsoring the following field trip for the CBA Big Weekend:

    San Geronimo Community Center environs
    Friday, June 5, 2026
    9:00 AM-12:00 PM
    Birding with Liz Lewis and Susan Kelly

    Registration is required for this trip. Registration opens on Tuesday, May 26 at 8 AM
    Limit of 14 participants for this trip.

    On this trip we will be introducing the CBA and the breeding codes to those who are new to the Atlas. All experience levels are welcome for this easy, three miles roundtrip. We will meet in the parking lot of the former San Geronimo Golf Club now offices of Marin County Fire. There is a porta potty in the parking lot. We will hike the paths and grounds of the former golf course.
    READ MORE

Field Trips Webinar Recordings Archive

2021

March
– Rare Birds of Marin 2020 – by Joseph Zeno, John King, Lucas Corneliuseen and Mark Schulist

February
– GIS Conservation – The Breeding Birds of Marin County – by William Wiskes – CLICK HERE

January
– Marin’s Breeding Birds (How We Know What We Know) by Dave DeSante – CLICK HERE
– New Breading Bird Atlas – by Juan Garcia – CLICK HERE

2020

September
– Snowy Plovers: A Natural History, Breeding Biology & Conservation – CLICK HERE
– Pacific Flyway Shorebird Surveys – CLICK HERE

October
– Diurnal Raptors of Marin – CLICK HERE
– The Natural History of Osprey in Marin County – CLICK HERE
– Red-Tales: Hawkish Behaviors and Migratory Stories – CLICK HERE

November
– Improving Habitat for Central Valley Waterbirds – CLICK HERE