Geocaching is a high-tech treasure hunting game where the objective is to locate geocaches (caches), or hidden containers, outdoors with the help of a Global Positioning System (GPS)-enabled device using coordinates that are posted online. Players of all ages, levels of physical fitness, and tech savviness enjoy exploring the world around them this way and then sharing their experiences online.

For questions or more information regarding Geocaching on District lands, please contact Jennifer Williams at (650) 691-1200.

geocaching box

Geocaching at Midpen

District Geocaching Program Use your GPS unit to locate geocaches hidden within a designated circuit of District preserves. Obtain a Preserve Circuit Passport. (Have a pocket-size passport mailed to you , or print this letter-size version .) Go to , register for a free basic membership, and obtain the GPS coordinates for the Preserve Circuit geocaches ("caches"). Search...Learn more
Purisima Creek Trail

Geocaching Guidelines

Geocaching can be a stimulating way to spend your time outdoors. The District invites you to enjoy the activity in a responsible manner within our open space preserves. Please read the District’s Geocaching Guidelines in its entirety before heading out on your geocaching adventure. These guidelines apply to both privately owned geocaches as well as those that are part of the District's...Learn more

Getting Started with Geocaching

What you need to know to begin your Geocaching adventures.Learn more