Help us achieve Better Trails | Greater Access for all trail users at Mount Diablo State Park
Support Our Trails 2035 Strategic Plan
Sign the Trails 2035 Petition
We are seeking 2,000-plus signatures by March 1, 2026, affirming widespread community support of our Better Trails | Greater Access strategic plan goals for all trail user groups at Mount Diablo State Park, especially off-road cyclists and park visitors with accessibility needs.
Trails 2035 Petition will be presented to the California State Parks Diablo Range District Superintendent, as part of our Phase II change-in-use (CIU) submission in Winter 2026.
Help us reach our inaugural fundraising milestone of $50,000 by March 1, 2026
Trails 2035 will not achieve its ambitious goals without community funding, especially given costs associated with change-in-use (CIU) trail projects, ADA-compliant trail construction projects, and trail maintenance projects conducted in sensitive species zones.
Make a Charitable Donation
View Winter 2026 Impact Report showcasing our community’s positive impact helping California State Parks implement the trail-related goals of the 2016 Road and Trail Management Plan (RTMP) for Mount Diablo State Park.
Trails provide a safe place for connecting to nature, supporting conservation, fitness and renewal-based activities like hiking, biking, running, and horseback riding, as well as landscape, wildflower and wildlife photography.
Our stewardship, access and Responsible Recreation initiatives aim to ensure that the trails at Mount Diablo State Park are accessible and welcoming for all park visitors while also protective of ecological and cultural resources.
Since October 2023, more than 1,000 Dig Day volunteers, logging nearly 6,000 hours, have helped service 11.5 miles of trails at Mount Diablo State Park.
Join us. You will make a difference.
On average, 55% of Dig Day volunteers identify as Hikers or Trail Runners, and 45% are Off-road Cyclists (MTB or Gravel Bike)
Trails Are Common Ground
More than 20% of Dig Day volunteers are Minors, developing lifelong awareness of the importance of service and Giving Back to the community and the trails
Support Us
Open Space Trails Alliance (DBA: Mount Diablo Trails Alliance) - is a 501(c)(3) tax-exempt nonprofit organization that is volunteer powered. Federal Tax ID # is 99-4480469
To learn how you can get more involved, visit Dig Days, Donate, and E-Alerts webpages
Trails provide a safe place for connecting to nature, supporting conservation, fitness and renewal-based activities like hiking, biking, running, and horseback riding, as well as landscape, wildflower and wildlife photography.
Our stewardship, access and Responsible Recreation initiatives aim to ensure that trails at Mount Diablo State Park are accessible and welcoming for all park visitors while also protective of ecological and cultural resources.
Learn more about how you can help protect the trails:
