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Mount Diablo Grand Loop Trail

MODERATE 158 reviews
#5 of 59 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
1856 feet
ROUTE TYPE
Loop

birding

hiking

nature trips

trail running

walking

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.

hiking
9 days ago

Awesome hike. Do the Moses Ridge out and back off the Juniper Trail (adds 0.8 miles) for some more great views.

hiking
21 days ago

We did this clockwise, starting at the parking area in the back of the Juniper campground. Views are amazing as you make a full circle around the summit of Mt. Diablo. There are some rather steep sections in this loop. The Bald Ridge Trail in particular is like a roller coaster, twisting and turning and steeply climbing up and down, but there are some spectacular view points in that section. It tooks us about 4 hours with a lunch break at the summit.

1 month ago

Lovely trail with views. Feb and March seem like a great time to go to avoid the heat and rattlesnakes.

hiking
2 months ago

Bald Ridge is a narrow path with brush - Runners may want to use Prospect Gap and Meridian Road paths

2 months ago

The views were great! The trail markers were a bit confusing so make sure you talk to a Park Ranger before starting

3 months ago

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.

3 months ago

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.

3 months ago

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 (and you clip your toenails!).

hiking
6 months ago

Good hike, a little mundane along the fire road though.

hiking
6 months ago

Goes up and down, can be quite steep. If you are in normal shape you should be able to do it without a problem.

8 months ago

The first mile and last 1-2 miles are pretty tough up hill. In between there are some short steep climbs but it's mostly down hill, which becomes pretty strenuous and is very difficult/dangerous without hiking shoes. The views are nice but not my favorite hike.

hiking
8 months ago

If you have even a tinc of patella-femoral issues, it might be good to sit this one out - a lot of up/down. That said, it's all sublime. My son and I made a point to stop and take things in - as a 4th-grader, he was a bit disappointed by the lack of devils, but got over that pretty smoothly. Can't beat the vistas and knowing that Eugene O'Neill probably hiked at least a portion of the same trails back in the day. Highly recommended, but bring plenty of water - you'll need it with some of those fire roads at the end.

hiking
8 months ago

I brought over 40 oz of water and it wasn't enough (it was in the 80's) but luckily there were water fountains at the top. The first couple miles of this hike are a breeze but it gets significantly hard/steeper for the next few miles. I run regularly but was still very sore the next day. It was a fun hike but not as easy as some other trails rated 'moderate' on this app.

hiking
8 months ago

Awesome, varied trail with some excellent sweeping views of the bay area. Doing the whole loop in 90+ degree weather is certainly a challenge for the less experienced hikers. Bring plenty of water and prepare to be handsomely rewarded for the endeavor with a visual feast of nature and wildlife.

9 months ago

very nice trail

hiking
11 months ago

We started from Juniper camp ground. It's hard and no shade at all. There are a lot of gravel which makes it tough will climbing down.

11 months ago

Wonderful views and gorgeous wildflowers! A good workout, and clean bathrooms in the camp site.

11 months ago

Awesome for a weekend hike. Took a few hours, was definitely a little difficult but a great hike!

11 months ago

very nice and lush in april lovrd it

hiking
11 months ago

Hard! Steep ups and downs. Of course there were the young folk who were running it but regardless it was great! Took me 5+ hours.

hiking
Sunday, November 13, 2016

Great trek. Went on a pretty clear day, almost constant views. It was some work though, but well worth it.

Tuesday, November 08, 2016

great views but was longer than 6.2 miles. more like 7.3 miles. so plan for 4.5 hrs.

hiking
Monday, September 12, 2016

This hike provided a relatively decent hike, but there wasn't a lot of shade for most of the hike. The scenery wasn't breathtaking, perhaps because of the time of year that I went? I'd still recommend trying it out though, if nit just for a day adventure.

Saturday, September 10, 2016

Gorgeous views of the whole tri-valley area, especially on a clear day.

hiking
Saturday, August 27, 2016

Great!

hiking
Tuesday, June 21, 2016

Gets very steep for a sustained period (some might find it difficult), but the gorgeous views throughout this hike make the incline more than worth it.

Monday, January 25, 2016

Went for Grand Loop and ended up doing The Summit. It was 10 miles round trip. Overall great experience.

Monday, December 28, 2015

Incredibly beautiful hike with amazing views. As other reviewers have noted, it does get pretty steep and there is a lot of going up and down. It is not too bad though if you have good hiking boots. I would not recommend doing this hike in normal sneakers since having boots with some tread on them will make this hike much easier!

camping
Saturday, December 19, 2015

definately

hiking
Sunday, October 04, 2015

Great hike with awesome views! Gets steep in some places so watch your footing. The geology of Mt.Diablo is facinating! But you see more of it on the trail through time (I was planning on completing that hike but plans change). It gets hot and there's minimal shade so avoid going on a hot day. The views are incredible! If it's clear enough you can see the sutro tower in SF. Beware: poison oak and tarantulas present!

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