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Stage Road to Mount Diablo Summit [CLOSED]

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Mount Diablo State Park

Stage Road to Mount Diablo Summit is a 14.3 mile loop trail located near Alamo, California that features beautiful wild flowers. The trail is rated as difficult and is primarily used for hiking, running, and nature trips.

Distance: 14.3 miles Elevation Gain: 3,966 feet Route Type: Loop


nature trips



wild flowers


no dogs

To prevent the spread of COVID-19 there is currently no vehicle access to this trail or others in the park. See here for more info:

2 months ago

Pretty decent walk that gets busy only towards the summit. Couple of extra steep sections on the way up.

3 months ago

There are many variations of this general route, and the flora changes drastically with the seasons, so it never really gets old. In the summer it can be brutally hot, so bring lots of water (3+ Liters) and plan on filling up at the top. Wear light long-sleves, light pants, and a wide-brimmed hat in the summer -- it's 80% direct sun. In the winter/spring months there are multiple streams that come to life with the trade off of wet and muddy trails that will slow your pace.

10 months ago

Lots of manure in the front section (before the cattle gate), which was accompanied by tons of flies. Did the Loop clockwise. The back (northern) half was more exposed. Might try an out and back next time.

Wed Jan 30 2019

This is a fabulous hike. Definitely one of the more difficult hikes on Diablo. A clear winter day gave me great views. This is a great training hike; it’s got good gain, a variety of terrain and decent mileage. Stoked!

Wed May 30 2018

Very easy to navigate, largely fire road, still beautiful wild flowers along the trails and 2-3 bathrooms as well. Quite exposed so lots of water will be good if the temp gets above 70s. I didn’t realized there was a road goes to the top with parking lot. I will definitely hike again especially in early spring time !

Sun Apr 29 2018

Love this trail, a nice 6 mile loop.. next time I want to hike to the Summit!!

11 months ago