The Sierra Club San Francisco Bay Chapter offers hikes and outdoor recreation for people of all ages. For a more complete listing of all Chapter outings and events see our calendar. There are many more events on the calendar than it is possible to list on Meetup!

Outings are conducted by the San Francisco Bay Chapter's Activity Sections and Regional Groups. Activity Sections are organized around either an activity, such as hiking or backpacking, or a social theme, such as Sierra Singles. No matter the theme, our outings and activities are open to all. Everyone is welcome, including those who are not members of Sierra Club (unless, rarely, otherwise stated). For more information about the Chapter's activity sections, click here.

You can also join the Sierra Club, which is a good idea because it is the Sierra Club that makes all this possible. Join or renew today. If you'd like to lead hikes or other outings, you'll need to be a member of the Club.

We also advocate for policies that protect our natural environment, support environmental candidates for public office, and provide opportunities for people who want to develop leadership skills to give back to the community and help the environment. We serve Alameda, Contra Costa, Marin, and San Francisco Counties, California.

For additional information about our outings, including outing policies and rating codes (1A, 2B, etc.), please see Hike Difficulty Codes.

Before you attend any Sierra Club activity please familiarize yourself with our Outings Policies and Background Information. Also, please note that dogs or other pets are permitted only on outings that are pre-advertised or otherwise identified as dog- or pet-permitted outings. (Service animals, as defined by the Americans with Disabilities Act, are not considered pets.)

Note: CST 2087766-40. Registration as a seller of travel does not constitute approval by the State of California

Groups near Orinda, CA