Toxic Mushroom Warning!
An independent special district in the San Francisco Bay Area that has preserved a regional greenbelt system of over 63,000 acres of public land and manages 26 open space preserves.
What's new?
Mountain Lion activity at Rancho San Antonio
Get the latest Midpen updates in our January Newsletter!
Now Hiring for multiple positions
New Midpen Board Members
New on-leash dog access at Upper La Honda Creek.
Upcoming Activities
January 20, 2019
January 20, 2019
January 22, 2019
Now open 7am - half an hour after sunset.
More Info>>