SPASM Lake Chabot

Race Information


Lake Chabot Regional Park, Castro Valley, CA 94546

  • Date:
  • Time:
  • Events:
  • Sunday, July 15, 2018
  • 8:00 a.m.
  • 50 KM Marathon 30 KM Half Marathon 5 mi (8:15 a.m.) Kids (7:50 a.m.)


The course starts at the Marina and travels around the popular SPASM Lake Chabot reservoir and surrounding hills. Great course for first-time trail runners!
(Distances are accurately measured using a RolatapeĀ® surveyor's measuring wheel.)

Driving Directions



Castro Valley



Bib Number & Shirt Pick-Up

7:00 a.m. - 7:45 a.m. at Lake Chabot Marina

Time Limit

  • Marathon - 7.5 hours (3 hrs 45 min, 11:45 a.m. @ 13 mi)
  • 50 Km - 8.5 hours (3 hrs 15 min, 11:15 a.m. @ 13 mi)

Aid Stations

Fully-stocked aid stations every 4 - 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.