Trail Map

The Mount Diablo Regional Trail Map (Sixth Edition, 2023)

Mount Diablo, Los Vaqueros, and Surrounding Parks—Featuring the Diablo Trail. Produced by Save Mount Diablo, printed by GreenInfo Network, and sponsored by Visit Concord.

Get the Map

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, featuring the Diablo Trail, our regional recreation map covers Mount Diablo and all surrounding parks and preserves.

With more than 120,000 acres of preserved lands on and around Mount Diablo, you can lose yourself in the beauty of the mountain for an hour, a day, or a week.

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 120,000 are now protected.

Our print map is full-color and waterproof and designed to be tear-free. We also offer a digital version of the map as well as a georeferenced map that is compatible with map navigating applications like Avenza.

Avenza works with both Android and iOS devices and both the app and the maps are free.

Today, Mount Diablo State Park and over 50 other parks make up a regional open space system of nearly 160 square miles that are traversed by about 700 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 60- to 70-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?

Printed copies of the map are not currently available. We will update this page after we get new printed maps.

The updated digital version of the map is available on Avenza now, and is available to download from our website by completing the form on the right-hand side of this page (or on the bottom of this page if you are on a mobile device).

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.

Updates to the Diablo Trail Map

2023 – Sixth Edition

Our sixth-edition regional recreation map, updated in June 2023, covers Mount Diablo and all surrounding parks and preserves.

For the sixth edition 2023 map, we worked with our partners to include all the new lands protected by Save Mount Diablo and recent conservation work in Contra Costa County, such as the 768-acre Finley Road Ranch property.

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 sponsor, Visit Concord, 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.

2020 – Fifth Edition

Featuring the Diablo Trail, our fifth-edition regional recreation map, updated in June 2020, covers Mount Diablo and all surrounding parks and preserves.

For the fifth edition 2020 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 shaded relief. And 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).

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 5,000 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.

2007 – First Edition

Save Mount Diablo released the first regional trail map with the goal of highlighting the vast outdoor recreation opportunities in the area.

Though other maps have beautifully detailed the numerous parks in the East Bay before this one, Save Mount Diablo’s map was the first to present them in a unified design, with cutting edge cartographic techniques.

John Kelly, a volunteer cartographer, devoted thousands of hours into making the map amazingly detailed, yet easy to use. He scanned dozens of other maps to glean information, and corrected the map in minute detail using 400 aerial photos.

Our volunteer map committee walked hundreds of miles with GPS units, working for two years to document all of Diablo’s parks and trails for the first time in the most accurate Diablo map ever created.

Utilizing this vast database of information collected via GPS surveys, Save Mount Diablo worked to incorporate hundreds of layers into the first map.

Map committee members tirelessly verified features, each person providing unique expertise in areas of history, first-hand field knowledge, and the harnessing of cartographic and design software.

Drafts of the map were sent to various agencies for their suggestions and corrections, including Contra Costa Water District, East Bay Regional Park District, Mount Diablo State Park, the Mount Diablo Interpretative Association, the City of Walnut Creek Open Space system, and the Walnut Creek Open Space Foundation.