The Mount Diablo Regional Trail Map (Fourth Edition, 2018)

“No other map shows all of the Diablo area parks in a unified design and in regional context. The map illustrates what has been accomplished and what private lands still need to be protected.”

Seth Adams, Land Conservation Director, Save Mount Diablo

Get the fourth edition, full-color, waterproof, and tear-proof recreational Mount Diablo Trail Map.

Featuring the Diablo Trail, our regional recreation map covers Mount Diablo and all surrounding parks and preserves. With more than five thousand acres of newly preserved lands since our last printing in 2012, you can lose yourself in the beauty of the mountain for an hour, a day, or a week.


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Get the Digital Map

It’s compatible with GPS map navigating applications like Avenza. 

Download map bundle on Avenza;

Download the free Avenza app here.

Want to use a different application? Download geospatial PDFs of the map to your device.

Map Side A – Mount Diablo & Surrounding Areas

Map Side B – Los Vaqueros & Surrounding Areas

Mount Diablo, Los Vaqueros, & Surrounding Parks—Featuring the Diablo Trail

Produced by Save Mount Diablo, printed by GreenInfo Network, and sponsored by Fremont Bank and the Sanderson Foundation.

Thanks to our Partners

We thank our partners for helping to create this updated map and for their continued efforts to ensure an abundance of wild open spaces so close to home. We celebrate the preservation of these additional lands acquired through all of our collective efforts: Save Mount Diablo’s donors and volunteers, and our partners.

About the Map

A highly popular and groundbreaking regional outdoor recreation map, the original 2007 edition was the first to show the entire Diablo region, with nearly forty parks and 520 miles of trails. The map displays protected lands and trails within the Diablo region, which is roughly bounded north to south from Suisun Bay to Highway 580 through the Altamont Pass, and west to east from Highway 680 to the Byron Highway. The map details 338,000 acres of land throughout central and eastern Contra Costa County and portions of Alameda County. Of the 338,000 acres shown, over 110,000 are now protected.

Today, Mount Diablo State Park and over fifty other preserves make up a regional open space system of nearly 160 square miles that are traversed by about seven hundred miles of public trails.

The past decade has been important for land conservation in the Mount Diablo area. Major gaps in a broad, sweeping loop of open space have been protected, stretching from Round Valley to Black Diamond Mines and back to Mount Diablo State Park. It is our hope that one day a sixty- to seventy-mile Grand Diablo Loop Trail will be completed. Wouldn’t it be fabulous for the Diablo Trail to pass south through the Altamont Pass and into the rest of the Diablo Range, helping give another reason to protect land along the way?

Featuring the Diablo Trail

Helping to popularize the Diablo Trail was one of the reasons for the creation of the regional recreation map. We believe the thirty-mile multi-use Diablo Trail perfectly showcases not only our stunning landscape but also the regional cooperation that allowed for preserved lands across Mount Diablo from Walnut Creek to Brentwood and Livermore.

Save Mount Diablo wanted to create a map that specifically details the Diablo Trail as it winds through six different open spaces—Shell Ridge Open Space, Diablo Foothills Regional Park, Mount Diablo State Park, Morgan Territory Regional Preserve, the Los Vaqueros watershed, and Round Valley Regional Preserve. It showcases the teamwork with our partners in protecting these majestic lands around Mount Diablo.

It is our hope that one day the thirty-mile trail can extend around the parks in a sixty- to seventy-mile Grand Loop Trail, encompassing protected lands within. Most of the route for the Grand Loop has already been protected; some sections of it are on public lands that are not yet open to the public.

Updates to the Diablo Trail Map

2018 – Fourth Edition

Featuring the Diablo Trail, our fourth-edition regional recreation map, updated in July 2018, covers Mount Diablo and all surrounding parks and preserves. With more than five thousand acres of newly preserved lands since our last printing in 2012, you can lose yourself in the beauty of the mountain for an hour, a day, or a week.

For the fourth edition 2018 map, we worked with our partners to include all the new conserved lands in Contra Costa County, including some on Mount Diablo. The updated map is beautiful, with a new color scheme and shaded relief. And now, we are able to offer the map online. The map is free to download on any iPhone or Android device. And it’s compatible with map navigating applications like Avenza (which is also free).

We thank our partners and sponsors for helping to create this updated map and online version that’s now making the map available to more audiences. We hope this free valuable resource will inspire more people to explore their backyards and deepen their love for nature.

2017 – Third Edition

In 2017, we updated the trail map for this first time since 2012. Our third-edition, full-color, waterproof, and tear-proof recreational trails map, “Mount Diablo, Los Vaqueros, & Surrounding Parks, Featuring the Diablo Trail” was printed in a limited run at the end of 2017, and the maps went fast! We quickly ran out of stock. Then, just a few months later, it became outdated when Anderson Ranch and more parks and preserves were protected throughout the area.

2012 – Second Edition

The second edition, published in 2012, added newly preserved lands including

• Protected lands in the Tassajara Valley area.
• East Bay Regional Park District and East Contra Costa County Habitat Conservancy lands connecting Mount Diablo to Black Diamond Mines and expanding preserves in the Vasco corridor.
• Contra Costa Water District’s mitigation lands for the Los Vaqueros Reservoir expansion.
• The Concord Naval Weapons Station Reuse Plan’s parks and open space, adding over 3,500 acres.
• Eighteen parcels purchased by Save Mount Diablo, including several along the Marsh Creek corridor, as well as the Thomas Home Ranch property on the southern edge of Pittsburg.