Save Mount Diablo will expand its free Discover Diablo Hikes and Outings program in 2025, including into areas rarely open to the public. The Walnut Creek-based nonprofit conservation group's program ...
WALNUT CREEK — There’s an inherent peril looming behind the estimated 150,000 cyclists who make the climb up Mount Diablo’s steep 3,849-feet summit each year: motorists speeding past them along the ...