Diablo Trail Run
Diablo Trail Run is listed for September 6, 2026 in Clayton, California, United States. Listed distances: 50K, Full Marathon, Half Marathon, 10 Miler, 4 Miler, 2 Miler, Kids' Run. Confirm the date, registration and travel details with the official organizer before you book.
About this race
RunSignup listed events: Half Marathon - trail_race - 13.1 Miles; Marathon - trail_race - 26.2 Miles; 50K - trail_race - 30.4 Miles; 4 Mi - trail_race - 4 Miles; 10 Mi - trail_race - 10 Miles; Kid's Run (6yo & younger, 50yd dash) - Free! - running_only - 50 Yards; Coastal Testing - running_race - 2 Miles. 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...
Key facts
- Date
- September 6, 2026
- Events
- 50K, Full Marathon, Half Marathon, 10 Miler, 4 Miler, 2 Miler, Kids' Run
- Surface
- Trail
- Official source
- Registration page & official site
- Listing status
- updated May 21, 2026
Before you register
- 1Confirm the race-day schedule
Verify the September 6, 2026 start times, packet pickup (collecting your race bib) and corral (your assigned start group) instructions on the official source before booking travel.
- 2Pin the exact start area
Use California as the planning region, then confirm the precise start, finish, parking and transport with the organizer.
- 3Pick your distance
Listed options are 50K, Full Marathon, Half Marathon, 10 Miler, 4 Miler, 2 Miler, Kids' Run. Check the source for current per-distance availability and limits.
- 4Review entry terms
Read entry rules, refund terms, participant limits and transfer rules before you pay.