"We walked 520 miles of trails," said Seth Adams, director of Land Programs for Save Mount Diablo.
Adams worked with a volunteer committee for two-and-a-half years to produce the double-sided map, which is full color, waterproof and tear-proof. It is titled "Mount Diablo, Los Vaqueros & Surrounding Parks, Featuring the Diablo Trail."
The cost was $9,000 to print 3,500 copies of the map.
"It was paid for completely with grants from REI," Adams said. "It's available online and at Forward Motion in Danville."
It sells for $9.95 or $13.50 online for tax and postage through Save Mount Diablo.
"No other map shows all of the Diablo parks in a unified design and in regional context," stated a Save Mount Diablo press release. "The map, which includes hill shading, illustrates what has been accomplished and what private lands still need to be protected."
The volunteer committee mapped out all of the open space's trails, access points and facilities, as well as relevant cultural features. Members walked the hundreds of mails of trails with GPS units to locate trails, mileages, elevation and other features. They also used more than 400 aerial photos to create the most accurate map ever produced. Cartographer John Kelly volunteered 2,000 hours.
Other maps show some of the Diablo parks but they each use different scales and do not show all of the regional trail connections to the mountain and between the various state, regional and local parks.
For more information or to purchase a map, visit www.savemountdiablo.org.