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Mount Diablo State Park
4.7 ★★★★★ 88 Google reviews · Running trail in Clayton, California · Hours vary
Runner's snapshot
- Surface
- Mixed
- Distance
- Not reported
- Shape
- Not reported
- Shade
- Not reported
- Access
- Not reported
Confirmed from Mount Diablo State Park's own listing, the park or land manager's website, and runner reviews. Blank cells mean we could not verify that fact — we would rather say "not reported" than invent one. There is no Easy / Moderate / Hard rating on this page on purpose: a one-word difficulty score tells you nothing about whether a trail suits your run. Surface, distance, shade and hours do.
Hiking area with trails, wildflowers, and panoramic views.
What runners say about Mount Diablo State Park
“Beautiful oaks, chestnuts and coulter pines adorn the green hills and valleys.”
Simply gorgeous place on a springtime morning in late April. Grass still green, trees leafing out, stream still running and wildflowers blooming. Idyllic. I took Back Creek Trail going up, and was pleasantly surprised to cross the creek a number of times - the water is running, but it’s easy to cross.
Just love these trails…so many options and lots of elevation available 🏔
Great trails, great park. Donner canyon to middle trail then Prospectors gap and up Summit Trail. 3586' of climb, 9.8 miles and 4hrs. Most trails very good and well marked.
Toughest trial yet, but at 3849' the eagle eye view of the bay area is incredible, almost sublime. It is a must if you are serious about hiking.
Trail conditions & character
“Donner Canyon is prettier than I expected, went there in February and found many waterfalls, many creeks and green hills everywhere”
“Donner Canyon is prettier than I expected, went there in February and found many waterfalls, many creeks and green hills everywhere”
“Very nice park with excellent views, rest rooms available and good parking”
“There are some technical areas that you need to be careful on the way up and especially on the way down (loose rock/steep) on the Summit Trail section.”
“You can hike, bike, camp, picnic… all the greats :) Do be aware no dogs are allowed on trails due to sensitive habitats.”
Plan your run at Mount Diablo State Park
The practical stuff
- AccessHours vary — hours are not posted for this trail, so check before an early or late run
- SurfaceMixed — more than one surface along the route, so check the segment you plan to run
- DistanceNot reported. Trail systems often quote total path mileage rather than a single loop, so measure the route you actually want before you drive out.
- ShadeNot reported. Assume some of it is exposed and carry water in summer.
- LightingRunners report lights on the path — useful for pre-dawn and after-work miles. Lighting and opening hours are separate things, so check both.
- At the trailheadparking, restrooms, water — reported by runners
- DogsWelcome, per reviewers. Leash rules vary by park — the trailhead sign is the authority.
- Websiteparks.ca.gov
- Phone+1 925-837-2525
- Social Instagram · Facebook
Running trails near Clayton
Other trails within easy driving distance — useful when this one is flooded, gated, or just not the run you had in mind today.
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Mount Diablo State Park
4.8 ★★★★★ 3,311 reviews
Sizable park with a summit visitor center & observation deck, plus trails, campsites & picnic areas.