Diablo Trail Run
Race Date
Sep 6, 2026
Location
Clayton, CA
The Experience
Mount Diablo provides spectacular views of the San Francisco Bay Area and surrounding valleys. The 4 mile course is relatively flat and fast within Mitchell Canyon. The longer events are mountainous and very scenic. (Distances are accurately measured using a Rolatape® surveyor's measuring wheel.)
Logistics
Race Day
Sunday, September 6, 2026
Start Time
8:00 AM
Giveaway
T-Shirt
Start Location
Diablo State Park (Mitchell Canyon Trailhead), Clayton, CA, 94517
Course Info
Course Type
Loop Course
Terrain
road
Difficulty
Ultra-Flat
Elevation Gain
0'
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Quality Score
Solid Pick453 years running
~76 finishers a year
growing or steady
16% returning runners
3 timing sources · 6 photos
runners from 3 states
winner 1:52:02
typical high 90°F
Race Day Weather
5-year historical avgStart (Low)
62°
Afternoon (High)
90°
Hot conditions — adjust pace expectations, prioritize hydration
0.0"
Precipitation
11 mph
Wind
48%
Humidity
Historical Finish Times
How 245 finishers actually crossed the line across 3 years.
Most recent
2025
Total finishers
245
Median time
3:12:27
Latest turnout
76
States
10
Turnout by year
2023–2025
Hover the histogram to inspect specific finish times.
Race Photos
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