Save Mount Diablo will expand its free Discover Diablo ... and other outdoor activities like mountain biking, rock climbing, meditation in nature, plein air painting events, bird watching, and ...

A grant helped pay for the 98-acre property in Contra Costa County that is said to contain rare volcanic habitat.

That land will now be permanently preserved and managed as part of a new state program focused on the San Andreas fault’s ...

decided on a whim to head to Mount Diablo State Park. It was somewhere we’d never ventured, and the pictures I’d seen — people tucked into its crevices, kids climbing knobby inclines and ...