Welcome to the Open Space Alliance

The Open Space Alliance is a nonprofit organization whose purpose is to promote public awareness and conservation of Open Space lands, and to educate the public about the natural, historic, cultural, educational, and recreational aspects of Open Space areas.

Special Announcements



For your holiday shopping convenience, the Open Space Gift Shop will be open 2 additional days:

Friday, November 28th and Friday, December 19th from 10 a.m. to 4 p.m.

The shop will also be open normal hours on weekends from 10 a.m. to 4 p.m.

On Sunday, December 14, from 12-9pm, the Bistronomy B2B restaurant in Nob Hill will donate 20% of all food sales to the Open Space Alliance. Bring your friends, enjoy a meal, and support the Open Space Alliance.

Events at Visitor Center

Saturday, December 20th
10:00am – 1:00 pm

Trail Watch Volunteers are the eyes and ears of Open Space. Volunteers report conditions on trails, educate the public on extraordinary natural and cultural resources, direct visitors to practice good land use and trail use ethics, and lend a hand on conservation projects such as trail building.

Please bring a driver’s license or legal form of identification.

Call 897-8831 to register.

Sunday, December 21st
11:00am – 1:00 pm


Help to build an Open Space Mandala using seeds and natural materials. The basic form of most mandalas is a square with four gates containing a circle with a center points. In some cultures the mandala represents the universe.

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