Building a community-driven Shared Stewardship Model focusing on Better Trails and Greater Access
We recruit and organize volunteers of all ages and trail user groups to support trail maintenance projects called Dig Days, which are planned, approved and managed by California State Parks.
We also help prepare Dig Day volunteers for standards-based trail work and rewarding stewardship experiences through our peer-reviewed Resources Library safety and maintenance handbooks and Learning Center instructional videos.
Dig Day projects focus on maintaining trails to be more accessible and sustainable, while also helping reduce surface water drainage impact on flora, fauna, wildlife and watershed resources.
All trail user groups and individuals are welcome at Dig Days.
Camel Rock Dig Day, Feb. 2025: 129 volunteers maintained 1.4 miles of trail in one day!
Trails Are Common Ground
Since October 2023, more than 900 Dig Day volunteers have logged 5,300 hours servicing 11 trail miles at Mount Diablo State Park
On average, 55% of Dig Day volunteers are Hikers or Trail Runners, and 45% are Off-road Cyclists (MTB & Gravel Bike)
Support Us
Open Space Trails Alliance (DBA: Mount Diablo Trails Alliance) - is a 501(c)(3) tax-exempt nonprofit organization that is 100% volunteer powered. Federal Tax ID is 99-4480469.
To learn how you can support our Shared Stewardship mission and goals, please visit our Dig Days, E-Alerts and Donate webpages.
