Looking for a great trail in Mount Diablo State Park, California? AllTrails has 72 great hiking trails, trail 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 37 hard trails in Mount Diablo State Park ranging from 3.6 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

bird watching

wild flowers

no dogs

trail running

wildlife

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.

Fantastic training hike. Wasn’t too hot, and some great views from the top (including a fire in Pittsburg). Highly recommend you do it clockwise to have it easier on the knees on descent. Also recommend you take a detour to avoid the Bald Ridge Trail by taking the Meridian Road to the Prospector’s Gap Rd after coming down off Eagle’s Peak - the Bald Ridge trail is extremely narrow with lots of poison oak and not great trail conditions.

Great training hike in the East Bay as we prepare for Mount Whitney next month. We went the clockwise direction on this loop and so glad we did. We took care of the steep section the first 6.5 miles up to the summit, and then had the wide, dirt fire trail the entire backside down. It’s definitely a treat going down the dirt fire trail when your legs are fatigued. It took us just over 6 hours to complete the 14 miles we recorded. There are lots of alternate routes and splits in the trail, so the AllTrails gps is a must. Went through 120 ounces of water along the way, but there is water and bathrooms at the summit if you need to fill back up.

Completed a version of this trek yesterday. I went up Eagle Peak trail and came down Mitchell Canyon. Going up was awesome. I wouldn’t come back down M.C. again though. Very little... and I mean very little views on Mitchell Canyon. I’ll do a figure 8 next time; intersecting at Eagle Peak/Bald Ridge & Meridian Ridge/Back Creek. Still lots of wild flowers and animals running around. Saw deer, turkey, rabbits, squirrels, lots of birds and a little snake. Saw no one on the way up, but a few hikers and bikers on the way down. Another reason to stay off Mitchell Canyon.

Challenging hike, with great views!

Trail was skinny at some points. Great trail.

Narrow and wildly overgrown in spots, terrain is loose in others, but there are some beautiful views. Encountered a skunk and ticks were numerous.

hiking
no shade
4 days ago

The flowers are gone. When I come back, will have to park at Mitchell Canyon. The city has approved resident only parking and will not be able to park on Regency or Rialto dr. Better there anyway since there are bathrooms, water and maps

enjoy the last month of free parking . Regency drive is going to be RESIDENTIAL Permit parking soon. While it was fun hosting all the hikers for several years. it will be nice to enjoy our quiet neighborhood again. Go to Mitchell Canyon to enjoy the park.

enjoy the last month of free parking . Regency drive is going to be RESIDENTIAL Permit parking soon. While it was fun hosting all the hikers for several years. it will be nice to enjoy our quiet neighborhood again. Go to Mitchell Canyon to enjoy the park.

enjoy the last month of free parking . Regency drive is going to be RESIDENTIAL Permit parking soon. While it was fun hosting all the hikers for several years. it will be nice to enjoy our quiet neighborhood again. Go to Mitchell Canyon to enjoy the park.

hiking
rocky
8 days ago

I hiked this trail today (6/16/19). It took about 4 hours to do 5 miles with a full pack as temperatures were about 80. It has spectacular views, but it is pretty steep in parts. The Donner Cabin Trail is steep, narrow and on the edge of a cliff. I was glad I had a hiking pole. I also drank about 4 liters of water. The wildflowers are almost all gone, but there were lots of lovely butterflies. This should probably be rated a hard trail.

Very nice hike and a real workout! I did it clockwise today but have done it counter clockwise in the past and like both directions.

hiking
no shade
13 days ago

hiking
no shade
14 days ago

hiking
16 days ago

Challenging hike. Took 9 hours to finish. Start early as it gets hot. Steep climbs, downhill need to be careful with gravel / slipping. Overall a highly enjoyable hike. Let’s lots of people on the trail, mist training for more challenging hikes - Mt Everest, Mt Whitney, Mt Fuji ...

on 6 Peaks Loop

hiking
16 days ago

This is an advanced hike - no surprise ( I made it in about 5 hours ). 4 recommendations: - start very early as the region is now getting very warm - do not forget your polls as there are some steep trails on the way down and it can be slippery - the junction to Olympia road on the way up was not obvious ( I missed it ) - watch out for poison oak It was very fun !

This is a nice hike and a great workout. Our totals showed 14 miles round trip and just under 3,500 feet of gain. Beautiful views of the Bay all along the way.

This is a hard trail. At some points, path is very narrow so be careful while walking. At least half the trail is shaded and It will be better if you start early to avoid summer heat. Waterfalls are so small and little water now. Overall its a good challenging 8+ miles hike.

Did this trail plus a detour up Mt. Diablo (total 18km, 1300m elevation, 6.5hrs). Slippery loose gravel!

Great hike! Tons of poison oak around. Watch out for ticks! & came across a baby rattlesnake on the trail too!

Great hike, pretty tough. Bring water cause the water resupply half way up tastes odd. Good water at the top however. We did run across a rattle snake chilling on the trail and had to figure out how to go around it.

hiking
bugs
no shade
rocky
washed out
20 days ago

This should be a great trail in the spring. The trail when I completed it was mostly exposed in 90^+ weather and little relief throughout the entire loop. If you plan to do the trail during the summer months bring PLENTY of water and expect a 2- mile pace average. The falls were sparse despite all the rain this year. Rates as moderate but I would rate it a low difficult. Elevation gain over a short distance and exposed trails with sporadic shade being the reason. Plan to visit again winter/spring with cool weather to reassess.

hiking
bugs
22 days ago

Excellent trail. A bit difficult when going downhill. Trekking poles were extremely helpful.

Saw a few rattlesnakes crossing the road!

hiking
23 days ago

My husband and I do this hike every other weekend since we live close by. We last did this hike on 6/2/2019 and the weather was definitely starting to warm up. There are still wildflowers in bloom and the water hasn't dried out yet.

Did this hike clockwise. Beautiful views throughout, only bummer about this hike really is that the summit is a parking lot with day-trippers who have driven up. Makes for a bit of an anticlimax, but you can find beautiful spots to rest below the summit with equally pretty views and a bit more isolation. Trail conditions are great. Only other downside of this hike is that the entire back half of the loop is a wide dirt access road, some of which is used by mountain bikers and horses. Makes for slightly less beautiful (if easier) hiking in my opinion, although the views from this part of the trail are outstanding.

Really enjoyed this trail. Only had a few hours to do it before having to head to the airport for a flight. Took about 2 hours up and 1 hour down as others have said, but that was moving fast (but not running) down. There are still some wildflowers. Clearly not peak, but definitely enough to enjoy. Arrived at the trail head at 8:30 am and it was completely socked in. Hiked for about 30 minutes and was above the clouds and it was pretty awesome. Then the fog rolled out and the scenery and views were great. Yes, there is a road to the top and yes there is a cell tower at the top so it's not the most remote trail ever. But it was definitely worth my 3 hour investment. And the area is riddled with connecting trails so you could easily spend days exploring this are. OH, ADVISE, it is confusing to follow the trails. Not so much because of unofficial offshoots but because there are so many trails (a good thing) and signage is sometimes awesome and sometimes not so much. With the map downloaded via AllTrails and the recording feature, anytime I got misguided, I realized within minutes and could get back on track. I recorded my hike, BUT it turned off several times so I have three recordings doing the single hike. So take it with a grain of salt.

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