Looking for a great trail in Mount Diablo State Park, California? AllTrails has 75 great hiking trails, running trails, mountain biking trails and more, with hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers, and nature lovers like you. Gearing up for a challenge? There are 38 hard trails in Mount Diablo State Park ranging from 4.4 to 27.6 miles and from 341 to 3,848 feet above sea level. Start checking them out and you'll be out on the trail in no time!

hiking

views

nature trips

wild flowers

bird watching

no dogs

wildlife

running

walking

forest

mountain biking

kid friendly

waterfall

horseback riding

camping

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 one of the best in the bay. Many visitors to Mt. Diablo head straight for the summit to enjoy the famous view from the observation deck area. 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 with entrances in Walnut Creek, Black Hawk, and Danville. 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. There are plenty of picnic areas as well as camping at Juniper Campground. Road bikers enjoy rides up North Gate or South Gate Road and the descents are just as fun. Mountain biking is also possible on many of the single track trails. Gates open 8am and close at sunset. Visitors should plan on being back at the parking area to be in their vehicles by sunset and headed out to avoid being locked in.

hiking
2 days ago

This is one of my favorite hiking routes: great views(especially in winter and spring), adequate elevation gain and length. But the name is misleading: there are no 6 peaks, only 4 peaks. Let us admit it: twin peaks are not really peaks.

Beautiful, gorgeous hike.

hiking
over grown
rocky
11 days ago

Want a worthy Diablo hike? Do all the peaks! This has steep climbs and descents that may be full of loose material. Some low overgrowth and encroaching poison oak, plus a few skree fields the trail crosses, all leading to excellent views. Parking? Park on the Mountaire Pkwy side, not on Regency where space in the permit free zones is limited.

hiking
bugs
over grown
rocky
11 days ago

This was one of the toughest trails we’ve done in a while but it is very scenic and beautiful with time to thousand 2566 feet to the summit.

hiking
11 days ago

You're not supposed to have bikes on the Little Yosemite Trail, so I suggested a trail edit to remove mountain biking as an activity option. I looked at the map on ebparks.org and it looks like you can horseback ride this whole loop though, so that should be added.

Nice hike- footing is tricky in some parts of the trail. Sadly the falls were dry. Will try again in the spring

hiking
11 days ago

Beautiful, breezy day. The weather early morning was perfect. Nice views & cool rock formations. We saw two deer & a few cows. There were several mountain bikers & horse back riders. Lots of cow & horse poop. The end of the hike had a very very very steep descent. Overall, great hike. We followed the loop on AllTrails & it was a little over 7 miles.

hiking
12 days ago

Went for this amazing hike this morning. Fantastic trail. But if you are heading over there, please note that the Parking area is not open until 8:00am, also there is a $6 fee to park. If you get there earlier, you could park in the neighborhood, but it is frowned upon.

Was fun, beautiful and difficult in parts. Good shoes recommended. Water at the camp ground at the top. We had a great day! Clockwise is the way!

This trail is quite enjoyable and is not nearly as steep and challenging as nearby Mt. Olympia/North Peak trail. I went clockwise. It took me 5 hours 30 mins with a few tiny breaks to complete it. Lots of shade in the first half of the ascent. Saw tarantulas few times. Pretty decent views starting from Bald Ridge trail and up to the summit. And no, the parking lot at the top doesn’t bother me at all. I usually grab an ice cream at the summit store as a llittle reward for the long ascent. If you want views all the way up (and very little or no shade), try the south route from Macedo ranch. Mitchell Canyon road on the way back is extremely boring but easy on your knees. I definitely recommend this trail.

hiking
no shade
rocky
12 days ago

Bathrooms through out the trail. Easy parking. Clearly marked. Keep an eye out for snakes

hiking
rocky
scramble
13 days ago

Definitely recommend clockwise route. Great views . Good training for halfdome. Enjoy!

hiking
16 days ago

Ok. Don’t believe me. Park Sat-Sunday, holidays and get ur $45 ticket. The signs are just make believe, right ?

running
16 days ago

This was a nice trail, with some shaded areas and a good mix of terrain. I ended up taking a longer route (semi-intentionally, semi-accidentally), but it added to the experience (including one smaller detour to a tree on top of a hill with panoramic views). The hills, while steep, were manageable for running. The weather was perfect for it today, sunny and warm, but with a slightly cool breeze. Might be too much to do this on a hot day.

hiking
16 days ago

Dont believe skip. You can park at regency for a great hike

running
17 days ago

Big run in a breezy day. 29km, 1500 D+. Happy and achy afterwards.

I love that mt diablo doesn't allow dogs. They are a nuisance

hiking
no shade
18 days ago

hiking
18 days ago

Started in Juniper Campground, walked clockwise. Started on fire road and all down hill - which means a long way back up, and the inclines were steep. At Prospector’s Gap, trail got a lot more interesting and no more fire roads. Great views, way more interesting once off the road. Cool to reach the summit and then have a nice easy walk down the hill back to the car.

hiking
bugs
no shade
rocky
18 days ago

Beautiful hike with great views. Saw some tarantulas on the way!

For my first time hiking Diablo. I think the trail was challenging in parts...but I extended it as well, but all in all. Great trail, great day!

Load More