Field Trips

Marin Audubon Society is providing a full schedule of free field trips for the 2023 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.

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!

Golden Gate Raptor Observatory at Hawk Hill – Marin Headlands

CA, United States

Wednesday, September 27, 2023
9:45 AM - 12:30 PM
Birding with Rich Cimino

Reservations are not required for this trip

The field trip, to the GGRO Hawk watch wing measurement platform, is timed as an optimal prime period for Broad-wing Hawk migration and Black Swift Migration.

Limited restroom facilities, a steep walk up to the ridge on loose gravel, layered clothing is best.

Directions: From 101 south to exit 442 toward Alexander Ave. Right on Alexander Ave, after 0.3 mi turn left on Bunker Rd. (continue through the tunnel) for approx. 1.2 miles, turn left on McCollough Road, in approx. 0.9 mi at the traffic circle, take the 2nd exit onto Conzelman Rd. for approx. 0.6 miles to the destination, where there is a parking area and a few portable restrooms nearby. Meet Rich at the parking lot at 9:45. 

The Ponds at Las Gallinas Valley Sanitary District (LGVSD)

CA, United States

Thursday October 5th, 2023
8:30 AM to noon
Birding with Sande and Bob Chilvers 

No registration required.  All participants are welcome to join this trip.

Join old friends and meet new ones as we resume our regularly scheduled walks on the first Thursday of the month at Las Gallinas. We especially welcome beginning birders on this leisurely walk around the ponds. Special thanks to Bob and Sande Chilvers for volunteering once again to lead our monthly walks in search of waterfowl, waders, songbirds, raptors, and shorebirds. Among other birds, we will see various species of rails, swallows and teals. With fall migration underway, we are likely to spot some interesting species, so come assist in our search. 

We welcome bird enthusiasts of all levels. We all help each other to find and identify the birds, and there are usually several experienced birders to assist. You don’t even have to arrive on time because we spend the first 30-60 minutes studying the birds around the first pond, and our group is easy to find. 

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 an outhouse in the parking area for public use or you can use the bathrooms at nearby McInnis Park. 

Abbott’s Lagoon and the Inverness Tennis Area – Birding in Marin

CA, United States

Birding in Marin - Series 8, Trip 10
Saturday, October 7, 2023
8:30 AM to mid afternoon
Birding with Jim White and Bob Battagin
Register HERE for this field trip

Registration required for this trip. Registration opens on September 27 at 8:00 AM

Abbott’s Lagoon on the Pacific Coast in the Point Reyes National Seashore is one of Marin’s premier birding locations sporting an eBird sum of 283 species. Fall migration south along the coast brings many birds to this area. Some that we hope to see include Ferruginous HawkBaird’s and Pectoral SandpipersRed-necked PhalaropesLapland LongspurHorned Lark and Pipits. Hundreds of ducks of a dozen species, geese, herons, Peregrines and Ospreys are also likely visitors. Plus you get some exercise; out and back is about 3 miles (some in sand) and Jim likes to do a full 5-mile loop. So pack a lunch for a picnic on the beach and bring a couple of layers for the fresh ocean air and help us spot a rarity.

To help bolster our participant’s species lists to our yearly goal of 200, we plan to stop along Tomales Bay near the Inverness Tennis club to look for Pine and Alder woodland birds. A surprising number of species have been seen here and there is a nice little beach where we usually find several kinds of gulls.

DIRECTIONS: From Point Reyes Station on Highway 1 go just south of town, right turn onto Sir Francis Drake Blvd, follow that thru Inverness up over Inverness ridge into the Point Reyes National Seashore then go north on Pierce Point Road. The ABBOTT’s Lagoon parking lot is on the left in about 3 miles. Carpool if you can, allow 1.5 hours from San Rafael.

Rodeo Lagoon – Marin Headlands

Wednesday, October 18th
7:30 AM to 12 PM
Birding with William Legge and David Wiechers
Register HERE for this Field Trip 

Registration required for this trip. Registration opens October 8 at 8AM.

With large numbers of birds moving through the area this time of year, it’s sure to be an interesting outing with unusual sightings a definite possibility. We’ll start with a 30-40 minute visible migration and sea watch from Rodeo Beach hoping for Parasitic Jaegers as well as other passing goodies before undertaking an extended circuit of Rodeo Lagoon in the search for scarce migrants including early winter wildfowl, shorebirds and fall passerines. More than 60 species should be possible at this time of year. The morning will begin with a sea watch at 7:30 AM.

DIRECTIONS: Head south on Hwy 101 and take the last Sausalito exit just before the Golden Gate Bridge. At the exit stop sign, turn right and go under the freeway, then follow the road down to the left. Within 300 feet turn left at the sign to the Marin Headlands (This is the only available left turn before you begin the descent into Sausalito). You should see the tun- nel with the five-minute light. Proceed through the tunnel on Bunker Road to the Rodeo Lagoon Parking Lot at the end and meet by the bridge over the channel to the beach. 

Field Trips Webinar Recordings Archive


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

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

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


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

– 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

– Improving Habitat for Central Valley Waterbirds – CLICK HERE