wild flowers

nature trips

no dogs


trail running



kid friendly

mountain biking

At the eastern fringe of the San Francisco Bay Region, Mount Diablo, elevation 3,849 feet, stands alone on the edge of California’s great Central Valley. At this point, the Coast Range consists only of low hills, none high enough to block the view from the upper slopes of the mountain. As a result, the view is spectacular. Many visitors to Mount Diablo head straight for the summit to enjoy the famous view. Summer days are sometimes hazy, and the best viewing is often on the day after a winter storm. Then, you can look to the west, beyond the Golden Gate Bridge, to the Farallon Islands; southeast to the James Lick Observatory on Mount Hamilton at 4,213 feet elevation; south to Mount Loma Prieta in the Santa Cruz Mountains at 3,791 feet elevation; north to Mount Saint Helena in the Coast Range at 4,344 feet, and still farther north to Mount Lassen in the Cascades at 10,466 feet. North and east of Mount Diablo, the San Joaquin and Sacramento Rivers meet to form the twisting waterways of the Delta. To the east beyond California’s great Central Valley, the crest of the Sierra Nevada seems to float in space. With binoculars, you may even be able to pick out Half Dome in Yosemite National Park. Mount Diablo State Park is one of the ecological treasures of the San Francisco Bay Area. Every season in the park has its special qualities. Discover for yourself the mountain's beautiful wildflowers, its extensive trail system, fascinating wildlife and distinctive rock formations. View the stars from its lofty heights, bike ride to its 3,849 foot summit or explore the more remote trails by horseback. The park offers hiking, biking, horseback riding and camping. Dogs must be on a leash under your control at all times. Dogs are not allowed on trails. Dogs must be in a tent, camper or enclosed vehicle during the night. Gates open 8am and close at sunset. Visitors should plan to be in their vehicles by sunset and headed out to avoid being locked in.

20 hours ago

Hard. Hot. Beautiful!!

Trekked this a few times training for Rainier. Solid hike.

trail running
6 days ago

Awesome run starting at Regency. 12 mile loop. Difficult rated for a reason but well worth it for the views and scenery. Not much shade. Got lost after taking a wrong turn towards the end but truly had a blast. Take plenty of water and fuel.

Used to hiking in the PNW, so I'll be honest here: was no expecting the heat and lack of shade. It was a tough hike that did offer a nice (albeit brown) view of the surrounding landscape in 360. If you look closely you can see SF from the summit, though not as nice a view as the summit of Mt. Tam.

Warning: there are water spouts along the trail. Don't drink from any of them except the one at the summit in the parking lot.

Lots of shade to cool off in. Avoid during prime sun. Good 2 1/2 hour hike.