Hike Your Pie Off

Hike Your Pie Off
Saturday, November 28, 10:00 a.m. - 2:00 p.m.
Coyote Valley Open Space Preserve

You really did it, you ate all that food for Thanksgiving. Maybe you feel guilty. Maybe you don't! Maybe you'd like to tell your house guests to Go Take a Hike, in our park! We'd LOVE to have you join us for a 4 mile hike along the new Arrowhead Trail. There will also be a shorter 2 mile hike as well. People of all ages welcome.

Play Your Pie Off
Saturday, November 28, 11:00 a.m. - 12:00 noon
Rotary PlayGarden at Guadalupe River Park

Join us for a fun, kid-friendly hour of playing nature games and having fun! This activity is suitable for all abilities and ages and will focus on exercise disguised as fun to help work off some tasty treats we may have indulged in over the holiday. Come laugh, learn and Play Your Pie Off!

Open Space Authority Protects Open Space on Santa Teresa Ridge

Andrea Mackenzie Lauded for Conservation Action and Vision

Andrea has been awarded the Bay Nature’s prestigious 2016 Local Hero for Conservation Action award, which recognizes leadership in conservation of the natural landscapes, wildlife and flor of the SF Bay Area.

“I am grateful to receive this award, while recognizing that major conservation gains are not won by individuals but by a determined and vigilant community of people,” said Andrea Mackenzie.
Read more

Open Space Authority Regulates Use of Unmanned Aerial Systems (Drones) on its Public Lands to Protect Wildlife and Foster Public Safety, Peace and Tranquility for Visitors


Hiking Leadership Training

Hiking Leadership Training

The Open Space Authority is partnering with Bay Area Wilderness Training to host 3 courses designed to train teachers and youth workers how to plan, organize, and lead fun and safe hikes with youth. The training will include fun games for the trail, leave no trace, the natural history of open spaces, meal planning and more.
Check out their website for dates and more information!

Request for Proposal

Request for Proposals: 2016 OSA Aquatic Habitat. Click HERE for more info.



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Trails Rancho Canada Del Oro

Rancho Cañada Del Oro
Quiet rural landscape and almost nine miles of trails in the Santa Cruz Mountain foothills.

Rancho Trail Map


Sierra Vista

Sierra Vista
Sweeping views and ten miles of trails in the Eastern foothills perched atop Alum Rock Park.

Sierra Vista/Boccardo Trail Map


Coyote Valley

Coyote Valley
4 miles of beautiful trail located in the Valley of the Heart’s Delight

Coyote Valley Trail Map


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Public Meetings
Bay on the Brink
Our Bay on the Brink

This provocative mini-doc outlines opportunities to protect SF Bay Area communities from catastrophic storms and flooding that could cost up to $10.4 billion.

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Public Meetings

Board and Committee Meetings and Agendas

Citizens Advisory Committee Meetings and Agendas