BayLands FrontRunners: established in October 1991, is a running and walking club for lesbians, gays and friends.

Hiking Clubs in the SF Bay Area: A thorough list of links to a wide variety of hiking-oriented groups.

Historic Larkspur Walking Tours dates and other information provided at website.

Larkspur walking group starts every weekday at 9:00 AM.

Marin Moonshiners sponsor easy three-mile hikes during each month's full moon. They start just before sunset and take advantage of moonlight to brighten the way.

Mount Tamalpais Interpretive Association (MTIA), is a volunteer organization that offers a full guided hiking program (from easy strolls, to rigorous multi-milers and everything in-between, including moonlight hikes and full moonrise viewing hikes), among other activities.

Mt. Tam Wednesday hikes. All welcome, no affiliation required.

Richardson Bay Center and Sanctuary engages children and adults in hikes, day camp, family events, lectures, guided walks and special events.

Sierra Club Marin Group Hikes. Please see the website for dates and details.

The Pacific Trail Society. Scheduled walking groups open to all.

The California Alpine Club is an outdoor and social organization that offers day and weekend hikes, backpack trips, canoe trips, and skiing, among others.