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?

Enter your best shot in our 10th Annual Photo Contest

Grantmaking Program submissions close on March 25!

Get the latest Midpen updates in our Spring Newsletter!

Now Hiring for multiple positions

Toxic Mushroom Warning!

Mountain Lion activity at Rancho San Antonio

Upcoming Activities