Field Trips

Marin Audubon Society is providing a full schedule of free field trips for the 2024 season.

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 won’t be able to attend a trip that you have registered for, please cancel using the “contact organizer” button on Ticketbud so that the spot may be opened up for someone else.

Attention: Recently Ticketbud has not opened for trip signups precisely at 8:00AM. This has led to confusion among would be participants who assumed the message “There are no tickets available at this time” means the trip is already sold out, but it doesn’t, so please try to sign up again a minute or two later. Ticketbud is working on the problem.

Our field trips are free to our members and the public, but we greatly appreciate your donations to support our programs and conservation projects! 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!

Sausalito, Strawberry Point – Mill Valley

Birding in Marin, Season 10 – Trip 2 Saturday, February 1, 2025 8:30 AM to mid afternoon Birding with Jim White and Bob Battagin Register HERE for this Field Trip Registration required. Registration opens at 8 AM on January 22 We get a fine view of the San Francisco Bay waters from the small park at Harbor Point and the nearby rocky shoreline. Some grebes, loons, gulls, cormorants and a few shorebirds are often visible. We hope for Black Turnstones and a Spotted Sandpiper. We will walk or take the short drive to see if Sausalito’s Yellow Crowned Night Heron has returned for another winter, usually offering a direct comparison to our Black-crowned Night Heron. We then intend to drive the 2 miles to Fort Baker under the West end of the Golden Gate Bridge to see birds in the active bay mouth and the calmer Coast Guard boat harbor. We wonder if the Wandering Tattler will be spending another winter on the breakwater. Bring lunch for a quick break for our final stop at Strawberry Point, a rather new development with a fine public path along the Richardson Bay shore. This portion of San Francisco Bay is protected from boating, hunting and fishing, so many diving ducks spend some of the winter there. If the herring are running this can be an active space. DIRECTIONS: Meet at 8:30 at the bay end of Harbor Drive. From Bridgeway in North Sausalito take Harbor Drive to the ample parking lot at its bay end.

The Ponds at Las Gallinas Sanitary District

Thursday, February 6, 2025 8:30 AM to 12:00 PM Birding with Mark Clark 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 first Thursday walk around the ponds at Las Gallinas.  On our search we’ll be looking for waterfowl, waders, songbirds, raptors and rails. 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 restroom in the parking area for public use.

The Ponds at Las Gallinas Sanitary District

Thursday, March 6, 2025 8:30 AM to 12:00 PM Birding with Mark Clark 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 first Thursday walk around the ponds at Las Gallinas.  On our search we’ll be looking for waterfowl, waders, songbirds, raptors and rails. 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 restroom in the parking area for public use.

Redwood-San Andreas Marsh and Piper Park – Larkspur

Saturday, February 15, 2025 8:30 AM - 12:00 PM Birding with Rich Cimino All participants are welcome to join this trip This field trip is a twofer: We will bird the Redwood-San Andreas Marsh, located behind Redwood High School in Larkspur on Lucky Drive, and Piper Park pine forest and athletic field. During low tides, the marsh supports shorebirds and waders, and during high tides, it supports many duck species and waders. We’ll meet at 8:30 AM in the DMV parking lot located at 75 Tamal Vista Boulevard Corte Madera and make a short walk to the marshlands. We’ll move on to Piper Park, which is located off Doherty Road behind the police station. Piper Park has an Oak-Pine ornamental “forest” around its picnic area, which can have Pygmy Nuthatches, Pine Siskins, three species of woodpeckers, and Red-breasted Sapsuckers. The athletic field may have Canada Geese, White-fronted Geese, Cackling Geese, American Pipits, Western Meadow Larks, Western Blue Birds, and Says Phoebe. Piper Park has a restroom. The field trip ends at noon. Those who want to enjoy the picnic grounds, please bring your lunch and drinks. Rain cancels.

Winter Birds of the Delta – Boat Trip

Sunday, February 16, 2025 8:40 AM to 4:00 PM Birding with David Wimpfheimer Register HERE for the Boat Trip The trip costs $130. Registration for this trip opens January 19 at 8AM. A waitlist will open if the trip sells out. Add your name to the list by clicking Contact Organizer prompt.  If you cancel your registration one week before the start of the trip and we can fill your spot with someone else on the waitlist, you will be reimbursed unless you would like to convert your registration fee into a donation to MAS. This cruise is a winter highlight for birders and provides a specialized look at the richness and history of the California Delta. After meeting at 8:40 for sign in and instructions, we’ll depart from the Antioch Marina at 9AM. As we head east, we enter sloughs and waterways with views out over the flooded agricultural fields that provide a refuge for flocks that nest in the north but winter here. Along with the flocks of snow geese, white fronted geese and Tundra swans, numerous ducks, shorebirds, and raptors are usually spotted. Well known birder and naturalist David Wimpfheimer will provide commentary and Ronn Patterson (captain and naturalist) will fill in bits about the history of the delta as we transit this altered but still viable ecosystem. Coffee, tea, hot chocolate is provided, bring lunch and snacks. Light rain will not cancel. Ticketholders will receive instructions and directions to the Antioch Marina, where the trip begins and ends, approximately one week prior to the trip.

Valley Ford Wetlands and Dillon Beach

Birding In Marin, Season 10, Trip 3 Saturday, March 1, 2025 9:00 AM to mid afternoon Birding with Jim White and Bob Battagin Register HERE for this Field Trip Registration required. Registration opens at 8AM on February 19, 2025 The Valley Ford Wetlands span the Marin/Sonoma County line less than a mile West of Highway 1 and just a few lies from the mouth of Tomales Bay and the Pacific coast at Dillon Beach. This involves for most of us a drive to the N/W corner of Marin so I’d like to recommend carpooling and delaying our meeting time to 9am. (Three can ride with me from Muir Beach at 8) Wading birds such as the Pacific Golden Plover and White Faced Ibis and many swallows including Bank Swallows have been seen there with more birder coverage in recent years. The rolling grassland pastures southwest the few miles to the coast can harbor many raptors, mostly Red Tails and Kestrels, but Ferruginous even Rough-legged Hawks and Eagles may sometimes be seen. There is a $10 dollar parking fee to visit Dillon beach, but the views and the potential Birds are good. The rocky tip of Marin, often obscured by fog, is just over a mile west, and the south edge of Bodega Bay and the mouth of Tomales Bay exchange a vast amount of water as the tide changes. Bring lunch, dress in layers. Heavy rain cancels Directions: Take Rt 1 north thru Marin or the Valley Ford road west from Petaluma to Valley Ford then from its N/W edge take Valley Ford Estero Rd west a mile where there is ample parking on the road edge and meet on the bridge. For a shorter route from San Rafael and Novato, take 101 north to Railroad Ave, exit 479 work you way west to Valley Ford and make a left on Valley Ford Estero Road, approx. one mile and park on the side of the road, near the bridge.

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