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Mt Diablo State Park Extended Loop [CLOSED]

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Mount Diablo State Park

Mt Diablo State Park Extended Loop is a 27.6 mile moderately trafficked loop trail located near Clayton, California that offers the chance to see wildlife and is rated as difficult. The trail offers a number of activity options.

Distance: 27.6 miles Elevation Gain: 6,847 feet Route Type: Loop


mountain biking

nature trips

bird watching





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:

Sun Nov 11 2018

A challenging hike that explores the diversity of Mt Diablo. Bring plenty of water (4L) or a filtration kit; you can only refill at the South Gate camp ground. Lots of exposure so start very early to avoid heat and complete before dark. Hiking poles recommended as legs will be tired at the end. Please post your experience with this hike when you’re done. Safe hiking!

10 months ago