Race Information


Diablo State Park, 96 Mitchell Canyon Road, Clayton CA 94517

  • Date:
  • Time:
  • Events:
  • Sunday, August 26, 2018
  • 8:00 a.m.
  • 50 KM Marathon Half Marathon 10 mi 4 mi (8:15 a.m.) Kids (7:50 a.m.)


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 RolatapeĀ® surveyor's measuring wheel.)

Driving Directions






Bib Number & Shirt Pick-Up

7:00 a.m. - 8:00 a.m. at the Mitchell Canyon Trailhead.

Time Limit & Cut-Off

Marathon - 9 hrs (3 hrs, 11:00 a.m. @ 9 mi)

50 Km - 9 hours (2 hrs 45 min, 10:45 a.m. @ 9 mi; 6.6 hrs, 2:35 p.m. @ 21 mi)

Aid Stations

Fully-stocked aid stations every 3 - 5 miles. You can expect fresh fruit, salty snacks, assorted candy, water, and Clif Shot Electrolyte sports drink. It is highly recommended that runners carry at least 20 oz. of water between aid stations


T-shirts will be given to all pre-registered runners. Award medals are given to the 1st female and male finishers overall and top three finishers in each age group. All finishers will receive a custom medal and 50 Km finishers will also receive a custom coaster.