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Mount Diablo Grand Loop Trail

MODERATE 294 reviews
#3 of 75 trails in

Mount Diablo Grand Loop Trail is a 6.7 mile moderately trafficked loop trail located near Clayton, California that features beautiful wild flowers and is rated as moderate. The trail offers a number of activity options and is accessible year-round.

Distance: 6.7 miles Elevation Gain: 1,856 feet Route Type: Loop

hiking

nature trips

walking

bird watching

running

forest

views

wild flowers

wildlife

no dogs

The Grand Loop offers a bird's-eye view of the Bay Area, and sometimes glimpses far beyond, of the Farallon Islands, Mount Lassen, the Sierra Nevada, and the Santa Cruz Mountains. It's also a a hotspot for wildflowers in the spring.

running
19 days ago

Breathtaking views

hiking
rocky
24 days ago

Great hike with a little bit of every type of terrain. Lots of fantastic vistas, some shade , some exposed. Not a summer hike. Bring at least 27oz of water and a snack

hiking
24 days ago

Great hike, but pretty tough. Be aware of your surroundings as I encountered an angry rattlesnake!

hiking
rocky
scramble
27 days ago

Beautiful views. Difficult up and down hills.

hiking
28 days ago

Dont recommend parking on Regency Drive. Regency Dr is all restricted parking where you need permits. Clayton Police are actively ticketing non-residential parking violations on weekends and holidays. save your $ and support the State Park system by parking over at Mitchell Canyon for $6.

hiking
no shade
rocky
1 month ago

What a great hike. Visiting CA from TN, so this was my only chance to get out and I picked the right one. Gorgeous views, not too hard, but definitely a challenge. we don't have mountains like this in central TN. Has a few technical areas, walking stick may have been helpful. Bring plenty of water.

hiking
bugs
fee
1 month ago

Overall great trail. It’s listed as moderate but the inclines and single track might be a little hard for the average hiker. I’d say it’s much more of a moderate to hard trail (or what I like to call moderate +). The trails loaded with a variety of trail types though which keeps it fun and interesting. From single tracks to wide and rolling paths, there’s something for everyone. After being on the trail for about 3 miles, you’ll find yourself buried deep in beautiful Manzanita, overlooking some of the best landscape views from San Francisco to the South Bay!

hiking
scramble
1 month ago

hiking
no shade
rocky
2 months ago

hiking
2 months 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
2 months ago

awsome ride..

hiking
2 months ago

Worth doing. Some parts have really nice views, others not so much. Probably should be categorized as hard.

hiking
rocky
2 months ago

Fantastic hike - though you better be ready with lots of water and some key rest stops. Loved the panoramic views of the East Bay and the mix of wide paths and switchbacks.

hiking
3 months ago

Beautiful panoramic views from every lookout point on a clear day. Amazing to see the changes in topography on every side of the mountain. I'd recommend requesting the written directions from the park ranger at the park's entrance. For novice hikers, we weren't lead astray. We saw ground squirrels, deer, tiny lizards, and plenty of birds. Definitely was hot. Thanks to fellow forum members for recommending the 3L of H2O. We headed counterclockwise (northwest) around the mountain and had our climatic summit at the end! The summit includes plenty of picnic benches, clean bathrooms, and water fountains for your enjoyment.

hiking
3 months ago

Very pretty and amazing rock formations.

hiking
bugs
rocky
3 months ago

Great trail! Be sure to take enough water, we took 3L each. Try to get there early to beat the sun too. We ran into a rattlesnake and ran back the other way haha.. gave it about 5 minutes, went back and it was gone. You’ll be fine, just keep your eyes open.

hiking
rocky
4 months ago

Great trail. Went in early August and had 3 L water each for experienced hikers. Rocky and gravelly in some places but rarely near the edge. Gorgeous views the entire trail. Took a short detour to the visitors center at the summit and it was also gorgeous. Almost no other hikers.

hiking
4 months ago

Differently not a summer time hike; take lots of water! Differently underestimated this hike. Slow going into the hike, but differently has some challenging hills.

hiking
6 months ago

Saw a few rattlesnakes crossing the road!

hiking
6 months ago

the park does a good job of keeping the trail away from vehicles. great views

hiking
no shade
rocky
6 months ago

This trail isn’t moderate, it’s actually hard!!!! Careful there are snakes on trail and make sure you use the app to not get lost and stay on track. Bring lots of water! At least a gallon will do.

hiking
6 months ago

Great trail. If the summit is in the clouds, I’d recommend skipping the spur to the top

hiking
6 months ago

Very crowded over memorial weekend! Very little wild live ..... maybe I am coming back an other time but I am not excited

hiking
6 months ago

Nice trail with beautiful views. A bit harder than I expected.

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