EveryTrail is now a part of AllTrails! Please click here to read more.

Best Trails in Mount Diablo State Park

184 reviews

#12 of 490 State Parks in California

Upgrade to Pro

Unlimited access to National Geographic TOPO! & Trails Illustrated Maps

Learn More »

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.

on North Peak Loop via Donne...
3 days ago

hiking

Views from the top of Mt.Olympia are great. Made the mistake of not carrying sunscreen or a hat - never repeating that! Gets really hot on a lot of parts of the trail since they are quite exposed. View from the summit of North Peak are not much to write home about. But the single track from Mt.Olympus to the North Peak is gorgeous!

on Summit Trail to Rock City...
3 days ago

Couldn't do this one, there is no place to park within 2 miles of the trailhead

on Waterfalls of Mount Diabl...
4 days ago

hiking

Really nice hike. Recommend good hiking shoes loose gravel at times. During this time no waterfalls August. Pay attention to the hiking map as there are many different trails. Parking is at a dead end of a residential area.

on North Peak Loop via Donne...
8 days ago

Extremely hard...

on Rock City to the Summit o...
14 days ago

hiking

Great hike. Very challenging, but very rewarding. Bring lots of water! I drank 2 litres on the way up. You can refill at the top.

on Mitchell Creek to Diablo ...
17 days ago

First time hiking Mt. Diablo, my wife and I hiked the loop from Mitchell Canyon to the Summit. Bring lots of water, we refilled at the Summit. Good mix of flat and steep inclines. Take the Bald Creek trails up and the Deer Flat and Mitchell Canyon trails down.

on Pine Creek and Wall Point...
18 days ago

hiking

Nice views and variety. Water features would be best in winter or spring

on Mitchell Creek to Diablo ...
1 month ago

hiking

An extremely strenuous hike if you start at the first parking lot and hike all the way you the top. Bring food and plenty of water. Consider hiking a shorter portion.

on Rock City to the Summit o...
1 month ago

Always a great hike. If attempting during summer bring a good amount of water

on Eagle Peak Loop
1 month ago

hiking

It was challenging and beautiful views!

on Mt Olympia via Waterfall ...
1 month ago

hiking

This was my intended route, but got off track and added almost a mile in my total hike to the summit. Excellent scenery. Heavy poison oak in areas, specifically Middle Trail. Beware and enjoy.

on Pine Creek and Wall Point...
1 month ago

Great walk and well marked trials

on Pine Creek and Wall Point Trail
1 month ago