Mount Diablo Trails Alliance is proud to announce the inaugural cohort of our Student Ambassadors Program, providing leadership, community service, and trail access advocacy learning opportunities for tomorrow’s leaders. Through June 2026, the Student Ambassadors will gain valuable experience through: promoting stewardship and access advocacy events, volunteering at Dig Day trail events, and participating in nonprofit and stakeholder-focused meetings to discuss long-term conservation and recreation goals.

Mount Diablo Trails Alliance (MDTA) is proud to launch our Responsible Recreation education advocacy program. In the coming months, we look forward to meeting you on the trails with pop-up events and trail user engagement to reinforce the importance of respecting the gift of the trails. 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.

Mount Diablo Trails Alliance (MDTA) is proud to announce Trails 2035 - our community-focused strategic plan designed to achieve Better Trails | Greater Access for all trail user groups at Mount Diablo State Park. To be successful, Trails 2035 requires a vital fundraising drive powered by charitable donations from people like you. Act Now! Support Our Trails 2035 Strategic Plan in Two Ways: Sign the Petition and Donate. Trails 2035 goals are based on fulfilling the policy recommendations of the 2016 Road and Trail Management Plan (RTMP) for Mount Diablo State Park.

On Saturday, November 15, Mount Diablo Trails Alliance (MDTA) in partnership with California State Parks (CSP) supported another successful Dig Day at Mount Diablo State Park. With little advance notice, 53 amazing volunteers of all ages and backgrounds participated at the Devil’s Slide Dig Day, making the trail more accessible and durable for years to come. CSP plans to announce the remainder of Dig Day Season Three’s schedule by December 1. There will be one Dig Day held per month in January, February, March and April 2026. Join us. You will make a difference.

Mount Diablo Trails Alliance (MDTA) is proud to announce that the first California State Parks (CSP) Dig Day of Season Three at Mount Diablo State Park will be held on Saturday, November 15. The eventbrite-powered registration will open on MDTA’s website by the end of the month. The serviced trail will be the upper portion of Devil’s Slide Trail (near Knobcone Road), which is an important connector trail near Rock City.

California State Parks (CSP) has opened the Public Comments survey link for the Alameda Tesla Project. This important survey closes on October 31, 2025. Your Action is Needed: Please take 5 minutes to complete the survey. Your input will help shape the future of Alameda Tesla and set a precedent for recreation access across the state park system. MDTA provides important talking points and topics in this blog post.

California State Parks (CSP) is hosting workshops on Saturday, September 20 (in person) and Tuesday, September 30 (virtual). CSP will outline the draft vision statement for the classification process of the Alameda Tesla property and two concept alternatives. A public comment session will be part of both workshops. We invite you to attend one of these two workshops to voice your opinion about the classification of the property. Special interest groups want to make this future park unit a Reserve, which could restrict or limit access for a lot of recreational users (e.g., off-road cyclists and equestrians).

Mount Diablo Trails Alliance is now a 501(c)(3) nonprofit organization. Donate today. You will make a difference, helping ensure that the Shared Stewardship model can be both sustainable and impactful for years to come.

MDTA is launching the Student Ambassador Program to give students a greater voice related to the trails and recreation opportunities, while providing opportunities to develop their leadership, problem solving and collaboration skills. Applications must be received no later than Saturday, August 30th at 7:00PM.

We are proud to share this Summer 2025 Impact Report, which showcases our dedicated, fast-growing 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. Join us this Fall 2025 for Dig Days Season Three. You will make a difference.

On Friday, May 2, an amazing group of 28 Volunteers overcame hardened soil and very tall grasses to conduct trail maintenance on Buckeye Trail to close out Dig Days Season Two. Due to these challenging soil conditions, the project was reduced to 0.3 miles from 0.6 miles, but the volunteers did not back down. The final product was another high-quality contribution to the Shared Stewardship’s long-term goals of Safer Trails and Greater Access.

On Saturday, March 22, more than 70 Volunteers delivered a herculean effort to conduct trail maintenance across three miles of Oyster Point Trail. All goals were achieved, helping facilitate a safer, better trail experience for park visitors who explore the spectacular southern territory of Mount Diablo State Park. 78% of the Dig Day volunteers identified as Hikers or Trail Runners. The other 22% were MTB or Gravel Cyclists. To achieve that strong showing across major trail user groups, many important organizations supported the Dig Day.

There has been a trail location change for the March 22nd Dig Day. The new trail location is Oyster Point Trail. The check-in and staging/parking areas are unchanged: the last, large pull-out on Finley Road. Protected species and plants have been observed at the originally-planned trail location, requiring evaluation of enhanced environmentally-sensitive preparations before any trail work can be conducted in the future. Thank you for your cooperation and support.

On Saturday, February 8th, California State Parks and Mount Diablo Trails Alliance supported a record-breaking Dig Day with a focus on safer, better trails for park visitors and the environment. 129 volunteers restored 1.4 miles of Camel Rock Trail at Mount Diablo State Park in one day, which is unprecedented at this iconic park unit. The achievement eclipsed the 1.1 miles of Diablo Ranch Trail that 135 Dig Day volunteers had serviced just a month ago.

Please abide and let the trails at Mount Diablo State Park and surrounding parks drain and dry out for a few days after this weekend’s atmospheric river. Most trails below 2,000 feet elevation (e.g., Junction Ranger Station) can become soft, making the tread vulnerable to damage. If the fire roads are soft and muddy, the trails will be even worse and can be quickly damaged by trail users of any mode. Thanks for your cooperation.

California State Parks soon will enforce seasonal restrictions in two (2) areas of Mount Diablo State Park to protect Peregrine Falcon nesting. Please do not enter the area closures from February 1 through July 31. To protect both the peregrine falcons nesting period and policy-based, change-in-use (CIU) Bike-Friendly trail access gains planned elsewhere in the State Park, please abide by the temporary closures. In other matters, the next important Dig Day volunteer opportunity is Saturday, February 8^th at Camel Rock Trail. Registration details herein.

On Saturday, January 11th, the Shared Stewardship model that California State Parks and Mount Diablo Trails Alliance are building together went next-level, thanks to the fast-growing community of like-minded trail users. More than 130 volunteers powered this important Dig Day project, restoring 1.1 miles of Diablo Ranch Trail in one day.

So much gratitude for the 21 Volunteers who powered the Buckeye Trail Dig Day at Mount Diablo State Park on Saturday, December 7th. These amazing Trail Champions showed up on just one week’s notice and delivered a gigantic effort. Yearslong trail damage contributed to safety and environmental hazards in three sections. All sections were addressed using proven trail maintenance/repair techniques, including full bench construction, berm and rut removal, water knick construction, and grade reversal construction.

Mount Diablo Trails Alliance is proud to share the California State Parks schedule of Dig Days Season Two at Mount Diablo State Park, covering December 2024 to April 2025. More than 500 Dig Day volunteers have helped repair and enhance nine (9) trails over the past 13 months. Help us sustain that momentum. If all Season Two Dig Days achieve key project goals, then the focus will shift to the Clayton–Mitchell Canyon side of the mountain in Season Three.

Please let the trails at Mount Diablo State Park drain and dry out for a few days after this weekend’s atmospheric river. So much heart, soul, teamwork and service from more than 500 volunteers have been dedicated to repairing many trails at Mount Diablo over the past 13 months. IT TAKES ALL OF US: Respecting the tread applies to Hikers, Equestrians, Runners and Cyclists, especially those on E-Bikes. The heavier E-bike and its motor-driven torque put more pressure on saturated trail tread than acoustic bikes.