Junction to Mount Diablo via Summit Trail

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Mount Diablo State Park

Junction to Mount Diablo via Summit Trail is a 4.5 mile heavily trafficked out and back trail located near Clayton, California that features a great forest setting and is rated as moderate. The trail is primarily used for hiking and nature trips.

Length4.5 miElevation gain1,440 ftRoute typeOut & back
HikingNature tripsForestViewsNo dogs
Waypoints (0)
Weather
UV Index
Daylight
Reviews (269)
Photos (1,425)
Activities (296)
Completed (1,127)
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Nirmana Davila
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Hiking

Lovely!

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Jacob Lemmons
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Hiking

Great trail, lots of wildflowers and rolling green hills. The summit itself had great views of the mountains and the clouds hanging above it. At 830 in the morning, there wasn’t anybody on the trail, but going down at 10-11 there were a couple of people. Overall, great, shorter trail to hike with great views.

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Maruti Tella
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Hiking

Be careful of mountain lion. spotted one

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Edgar Carrillo
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Hiking

Amazing trail! It’s a great trail for those who are new to hiking but want to try a more difficult hike. The view is amazing but try to go on a clear day so you can the sierra nevadas

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Peter Milkovic
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Hiking

So beautiful! Excellent brother sister hike

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Amit P
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Hiking
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Bonnie Brannen
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Hiking
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Am Als
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Hiking
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Erin Sumpthing
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Hiking

Lots of up and then lots of down! The views are so beautiful and absolutely worth the climb. We started on the earlier side of things (10ish) and there weren’t too many people hit definitely picked up as we came back down. We parked in the picnic lot across from the ranger station. Would recommend!

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Stephen Jamieson
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Hiking

Easy peasy. Not too many people at the start. Got fairly busy on the way back.

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Sanskar Panse
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Guido Franco
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Hiking

Amazing but I would consider it hard and not moderate for some

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Shashank Gokhale
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Hiking
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Kelli Sparkman
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Hiking

Trail is well maintained and rocky. Definitely gets windy at times, so bring layers. Bathroom available by Ranger Station near where you park (I parked at the little picnic area across from the station) and about 1/2 way up. Steady climb all the way up and gorgeous views all the way. Great workout!

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Pranay Bonagiri
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Hiking

Definitely steep!

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Melissa Williams
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Hiking
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Diana Hayes
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Hiking

Beautiful! Everything was so green and the trail was still a bit damp from the rains this week so it made it easier to hike on. Summit was amazing, I could see the snow on the Sierra ‘s. A busy trail but everyone was courteous and pulled up their masks as you passed each other. 

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Peter Martin
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Hiking
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Evan Mok
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Hiking
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Dan Moreno
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Hiking

Great hike. Many hikers on the weekend but the views are spectacular. Can get very windy at the top.

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michael mitchell
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BREE MCTAGGART
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cheryl treadwell
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Hiking
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Richard Sarmiento
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Hiking

First time. Focused on not getting lost. Beautiful.

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James Stillman IV
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Running

Love Castle Rock Park! Fun entrance to make it to the summit of Mt. Diablo. Beautiful trails! 5 Stars.

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Joseph Snyder
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Hiking

Great workout. The fog was too thick for me to see anything but on a clear day I bet the views are great. Tough last ~1.5 miles. Pack light.

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Ali Malik
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Hiking
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Karim Ait Ali
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Hiking
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Marisa Moreno
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OHV/Off-road driving

Awesome trail; some shade and great views all around. Beautiful sunset.

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Abe Handler
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Hiking
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