Lake Chabot Trail Challenge

Race Info:

We are so excited to celebrate the 42nd annual Lake Chabot Trail Challenge Half Marathon and 5K. This race is well regarded amongst serious trail runners in the outlying areas. The race begins at 8:00am for the Half Marathon and 8:30am for the 5K. Please arrive early so that you may find parking, pick up your bibs, use restrooms facilities, and be properly prepared to race before the start. Race takes place rain or shine and there are no refunds.

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Race Course:

The half marathon course is a scenic, hilly loop, mainly on dirt fire roads. The ridge-line views look down upon scenic Lake Chabot, surrounding grassy slopes, and eucalyptus groves. Mt. Diablo and San Francisco Bay are visible along the route. There are water stations with first aid and radio support; we recommend bringing your own hydration as well. The half marathon has a time limit of 3.5 hours. The 5k (3.1 miles) course is an out and back that has gentle rolling hills and consists mostly of paved surfaces. This route includes one water station with first aid and radio support.

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Race Fee:

Pre-registered runners are guaranteed a T-shirt if they sign up by Saturday, May 9, 2026. The registration fee is $40 for the 5K and $65 for the Half Marathon, with a deadline of Saturday, June 6th. Race-day registration will be available for $45 (5K) and $70 (Half Marathon); please note that only cash, check, or Venmo will be accepted on the day of the event.

There is a nominal fee (~$5) for Chabot parking lot. Free parking on Lake Chabot Rd and nearby streets.

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Race Packet & Bib Pickup:

We will have race packet and bib pick-up on Sunday, June 7, 2026, starting at 7:00am at the Willow picnic site which is also the finish line area. We will not be mailing out any race packets or bibs. Both races are chip-timed.

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T-Shirt:

Entry fee includes short sleeve, high quality T-shirts for registrations by May 9, 2026, so sign-up early. There is no guarantee of T-shirts for runners registered after that date and on race day. We ask for those who did not get a shirt to check in after the race. Please ensure that you select the appropriate T-shirt size. We will not be doing any size exchanges from your original request.