Impact Report and Maps
Photo: David Cervenka Photography.
Dig Day volunteers have serviced 12 miles of trail tread since Oct. 2023, donating more than 6,200 hours!
View our Winter 2026 Impact Report showcasing Dig Days’ positive impact helping California State Parks implement the Trails Stewardship goals of the 2016 Road and Trail Management Plan (RTMP) for Mount Diablo State Park.
Trails Serviced by Dig Days
Northwest Territory Trails
Buckeye: 1.4 miles (2024); 0.3 mile (2025)
Camel Rock: 0.3 mile (2024); 1.4 miles (2025)
Castle Rock: 0.5 mile (2024)
Diablo Ranch: 1.1 miles (2025)
Little Yosemite: 0.6 mile (2024)
Mothers: 0.3 mile (2026)
Secret: 0.4 mile (2023)
Social Trail Removal: 0.5 mile (2025)
Sunset: 0.4 mile (2023)
Maps Source: Mount Diablo Interpretative Association (MDIA).
Map Legend: Yellow air-brushing highlights serviced trail sections by a Dig Day trail maintenance event.
Upper Mountain Trails
Lower Juniper: 1.1 miles (2024)
Oak Knoll: 0.7 mile (2024)
Upper Summit: 1.1 miles (2024)
Rock City Trails
Devil’s Slide: 0.3 mile (2025)
Lower Summit: 0.6 mile (2026)
Staircase: 0.1 mile (2025)
Old Finley Road Trails
Oyster Point: 0.3 mile (2023); 0.7 mile (2025)