no dogs

wild flowers


nature trips

trail running




kid friendly

mountain biking


horseback riding

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.

Tougher than anticipated.

Rock City is so fun! What a great little area for picnic or just adventuring around! I never knew there was such a unique little spot so close to home!

This hike is beautiful in the winter when it's foggy. the whole time we were looking down on an ocean of white clouds. And it wasn't too hot in January. It was perfect hiking weather. There were also a lot of beautiful madrone and manzanita trees covered in green moss. Winter is definitely the time to go. I couldn't imagine the misery of hiking up to the summit it the summer. The hike was a good workout, especially the last 2 miles before reaching the summit. The first 2 miles are pretty mild, but gorgeous.

Amazing trail, and do walk the trail clockwise! Also, remember to bring cash for the $6 parking fee. They require you to put exactly $6 cash into a envelope.

Beautiful route lined with wild daffodils in January. My suggestion is to bring two liters of water, some trail mix and burrito. Then hike the route counter clockwise as to reach the waterfalls slightly over two hours. From there you can rest, eat and take in the vista. After a well deserved rest, hike back to the trailhead returning in an hour. Sit pads was my luxury item so I had something soft to sit on over the jagged rock.

Did this hike today. Yes, it's hard. It's also super worth it! The views are amazing. In fact today we were above the clouds and it was gorgeous. Will do it again. It took me 4 hours to complete but no doubt a more accomplished hiker could do it in less.

Great winter trail when the creeks are all flowing and the sky is overcast. Got turned around a couple of times and took a tumble at one of the rocky parts where we got off the main trail. Moderate to difficult on our scale.

I did this hike yesterday. It's pretty tough but the trail is well maintained, there are several (4) toilets along the way, and there's water at the top of the mountain and in one of the campgrounds 1/3 of the way up. This trail is also used by mountain bikers.

Awesome trail! Beautiful scenery, and great views from the top. Trail signs are bit confusing so read them closely.

Great views from above the fog line. Well maintained trail, half on fire road. Start counter clockwise if you want less steeper climbs.

Me and my partner came here not knowing where the trail started. We parked at the base of the mountain, took a map and started. Obviously it's a mountain so lots of inclines. It ended up being a whole day hike and it was dark by the time we made it back to our car. Really nice views at the top! We spotted a lot of deer on our way back.

Bring hiking boots, water, snacks. Areas can get steep, and muddy. A little harder than moderate.

Small trickles of water at this time of year. Little muddy at the beginning and end.

12 days ago

Beautiful trail one of my absolute favorite,

Loved this hike, but make sure you have good hiking shoes. Only reason it’s not 5 Stars for me is the fact that you start the hike with a steep up hill AND end it with a steep up hill. Very beautiful though.

Trail is great in most parts. Some areas are steeper than others so bring good hiking boots on this hike.

Very hard hike. Do it only if you are in very good shape.
Doing the loop clockwise is the way to go.

Loved! Great work out and a nice mix of up and down. The trail was really steep and loose at points so make sure you’ve got good shoes.

We started at the Marsh Creek Road Parking Lot, hiked up to the Three Spring Road. We turned left to the East Trail, then took the Mt. Olympia Road and the North Peak Road hiked up the the North Peak. After taking a lunch break we hiked down from North Peak Road, continued to the Prospector's Gap Road, turned right onto the Middle Trail, continued to the Falls Trail, Olympia Trail and the Three Spring Road to complete the loop. Total distance was 10.6 miles, elevation gain 3,600 ft. We got a good work out and the views were gorgeous. The weather was perfect at this time of year. We started a 9:30 and completed at 3:30.

Sentinel Rock and Rock City are very cool sights to see at the turnaround of this hike. Good trails.
Parking is not good at all. There is no parking at all at the trailhead (which is right at the south entrance to the park). There are only a couple spots to park in the neighborhood just below the park

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