Mount Diablo gives Contra Costa County the big view

Mount Diablo is the kind of landmark that helps you understand Contra Costa County from above. The mountain rises out of the East Bay, and the summit view is the reason many people go first. It also shows the open-space side of a county many people know through suburbs and commute routes.

On a clear day, the summit view can stretch far in every direction. The park also has varied habitats, rock formations, hiking trails, bike trails, horseback riding, camping, picnic areas, nature viewing, and the Summit Visitor Center.

For a simple first trip, decide whether you are going for the summit, a trail, or a picnic. Those are very different days. Check State Parks for gate hours, maps, fees, and current notices before you drive up.