Mount Diablo Grand Loop Trail is a 6.1 mile moderately trafficked loop trail located near Clayton, CA that features beautiful wild flowers and is rated as moderate. The trail offers a number of activity options and is accessible year-round.
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.
Great trek. Went on a pretty clear day, almost constant views. It was some work though, but well worth it.
great views but was longer than 6.2 miles. more like 7.3 miles. so plan for 4.5 hrs.
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.
Gorgeous views of the whole tri-valley area, especially on a clear day.
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.
Went for Grand Loop and ended up doing The Summit. It was 10 miles round trip. Overall great experience.
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!
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!
Take the grand loop and have lots of water in your backpack. Awesome trail with terrific views.
Great Hike! If you do the loop in a clockwise fashion it is more difficult that counterclockwise. When you do the loop going clockwise be careful once you start the uphill section at Murchio Gap. It is narrow, steep, and has a lot of loose gravel. Just before before you get to Prospectors Gap you come to a look out that is a great place to take photos or just enjoy the view. The rest of the way is a little uphill but the big stuff is in your rear view now.
Weather: windy and cold at peaks, sunny with slight breeze for most of the hike, shade was rare (approx 1/3 in shade)
Gear: do-able without hiking shoes or shoes with no grip, a camel pack of water ~2 liters was enough, hat and tons of sunblock
Trail: more inclines than anticipated, the trail changes often between sand dirt and rocks, no poison oak risk if you stay on the trail, there is poison oak on the sides of the trail
Here are the directions we followed for the Grand Loop:
- Juniper Campground Site #23 Look for wooden fence marker for DEER FLAT ROAD
- DEER FLAT ROAD for 0.75mi (uphill)
- Right onto MERIDIAN RIDGE (downhill)
- MERIDIAN RIDGE for 1mi
- MERIDIAN RIDGE comes to a junction with 2 trails
- ATTENTION: Pick the one on the far right, narrow path, steep uphill = BALD RIDGE TRAIL. Does not stand out immediately.
- BALD RIDGE TRAIL for 1.5mi (up and downhill)
- Right onto NORTH PEAK TRAIL toward summit for 1mi (uphill)
- Reach DEVIL’S ELBOW (great photo op)
- Right towards SUMMIT TRAIL TO LOWER SUMMIT PARKING LOT (uphill)
- Walk to the back of lot and descend to JUNIPER TRAIL
-Left to stay on JUNIPER TRAIL at trail marker
- Stay on JUNIPER TRAIL for 1mi to get back to car (downhill)
Great Hike with gorgeous views. Park at Juniper Campground. If you walk though the campground, you will start at the deer flat trail head, which has a bunch of ups and downs in the beginning, and a bunch of steep climbs 3/4 of the way to the summit. Once you get to the top, you have a fast descent back to the parking lot.
If you go via the Juniper Trail at the immediate right of the parking lot, you'll have a quick steep climb to the top, with a long, slow decent, and then the various ups and downs.
I really liked this hike. Some of the steep climbs are pretty rough, so you better be in shape!
I really enjoyed this hike today. I will say, however, this loop trail is very challenging. I started my hike in the Michael Canyon parking lot. The first couple miles is relatively flat. But once you get to about mile three, the honeymoon is over. At this point, there is a significant incline almost all the way to the top (About 2-3 miles). Coming down the backside of this climb is very tricky...lots of loose gravel, which makes for some slipping/sliding. Overall, I would highly recommend this trail for anyone who is looking for a good workout. Of you don't like incline hikes, you definitely don't want any part of this hike.