Change-in-Use Project Maps

This section illustrates the potential reach and impact of Better Trails | Greater Access change-in-use (CIU) submissions as part of Trails 2035. Even if all three phases (or projects) are reviewed, approved and implemented in full by 2035, the access ratio of off-road cyclists to singletrack trails at Mount Diablo State Park would increase to approximately 47%, up from 18% currently.

That relative gap to the access ratios of Hikers and Trail Runners at 100% and Equestrians at 99.5% would ensure that there are still plenty of singletrack trail miles not open to off-road cyclists.

Phase I

Map of Mount Diablo State Park showing trail routes, parking areas, scenic spots, and points of interest with labeled trails and topographic lines.

Trails: Lower Juniper, Upper Summit and Oak Knoll

Map source: Mount Diablo State Park ARCGIS

Phase II

Trails: Little Yosemite, Camel Rock, Secret, Bruce Lee Spring, Donner, Hetherrington, Wasserman, Coulter Pine, Lower Back Creek/Tick Wood, and Olympia

Maps source: Mount Diablo State Park ARCGIS

Little Yosemite and Camel Rock Trails (Lower Mountain)

Secret Trail (Lower Mountain)

Topographic map with trails highlighted in yellow, including Heatherington Loop Trail, Lower Donner Trail, Bruce Lee Spring Trail, and Clayton Oaks Road, with contour lines indicating elevation changes.
Topographic map of a hiking area showing trails highlighted in yellow, including Coulter Pine Trail, Bear Creek Trail, Tick Wood Trail, and Donner Canyon Road. The map includes contour lines, stream features, and roadways.
A topographic map showing terrain elevation with contour lines, featuring trails labeled 'Secret Trail' and 'Wall Point Road,' highlighted in yellow.
Topographic map showing trails and terrain features with elevation lines, including trails such as Stage Road, Burna Road, Buckeye Trail, and others, with shaded areas indicating elevation changes.
Topographic map of a hiking trail area showing different trails marked in various colors, with elevation lines, and labels such as Olympia Trail, Mt. Olympia Road, and Cardinet Oaks Road.

Olympia Trail (Clayton Side)

Coulter Pine and Lower Back Creek/Tick Wood Trails (Clayton Side)

Bruce Lee Spring, Donner, Hetherrington, and Wasserman Trails (Clayton Side)

Phase III

Trails: Bob’s Pond, Tassajara Creek, Jeremiah, Walnut, Madrone (Trail through Time), and Devil’s Slide

Maps source: Mount Diablo State Park ARCGIS

Topographic map showing trails, roads, elevation contours, and highlighted trail sections in yellow, with some trail names like Riggs Canyon Road, Highland Ridge Road, and Old Finley Road.

Bob’s Pond, Tassajara Creek, Jeremiah and Walnut Trails

Topographical map showing trail routes and elevation contours, highlighting the Devil's Slide Trail with a yellow overlay, along with various trail names, parking areas, and trail markers.

Madrone (Trail through Time) and Devil’s Slide Trails

Learn More about the Trails 2035 Strategic Plan

STRATEGIC PLAN
GOALS
CIU TRACKER
CIU PROJECT MAPS