Trail Challenge

34th running of the Lake Chabot Trail Challenge Half Marathon & 5K 

USATF Sanctioned

2016 Lake Chabot Trail Challenge Results
2016 Event Photos

2017 Event date:
Sunday June 4th, 2017
Half Marathon: 8:00 AM, 5k: 8:30 AM

Both races will use chip timing.

Half Marathon: A scenic, hilly loop, mainly on dirt fire roads with five aid stations. There is a 3.5 hour time limit. Carrying water is advisable.

Please note:

  1. Due to upcoming work on the dam this summer, both events will have new routes.
  2. The Half Marathon will start at 8am and the 5k will start at 8:30am.
  3. Please be prepared to share the roads and trails with other users.

Lake Chabot Trail Challenge Half Marathon Map
Lake Chabot Trail Challenge 5K Course Map

Start and finish near the Lake Chabot Marina

17930 Lake Chabot Road
Castro Valley, CA 94546
There is a nominal fee to park inside lot or park for free on Lake Chabot Rd.

Quality T-shirt and finisher medals to the first 400 registered runners. Post-race refreshments and prize raffle. Plaque and complimentary entry to next year's race will be given to the first overall man and woman in each race. Medals will be given to the top 3 in each of 13 age divisions in the half marathon in 5 year age categories. Medals to the top 3 in each of the 10 age divisions in the 5K. Medal also given to the first male/female under 9 in the 5K and under 14 in the half marathon.

On-line registration (through Thursday, June 1) cost is $50 for 1/2 Marathon, $35 for 5k.
Race day registration (after Thursday, June 1) is $65 for 1/2 Marathon, $40 for 5k.
Bib numbers will not be mailed. Race day registration and bib pick-up begins at 6:30 am at the Willow picnic site.
This is also the finish line area.

Nominal fee (~$5) for Chabot parking lot. Free parking on Chabot Rd and nearby streets. 

Register Now on-line!

Race Sponsors
If you or your company would like to be an official sponsor, please contact the Race Director. The Lake Chabot Trail Challenge Half Marathon/5K is the primary fundraiser for the Castro Valley Track Club, and all contributions are fully tax deductible 

Be a part of the East Bay Triple Crown and conquer the hills of the East Bay: 

Overall male and female winners (lowest combined times for all three events) will have their names and times engraved on the Triple Crown trophy, on display at the Transports store in Oakland.

  1. The Tilden Tough Ten is the first leg of the East Bay Triple Crown.  Information and registration is at the following link:  
  2. The Lake Chabot Trail Challenge is the second leg.   
  3. The Woodminster  Cross Country Trail Race is the third and final leg.  Information and registration is at the following link:

Contact Us

2015 Lake Chabot Trail Challenge results & photos:

Event Results

Photos of top finishers and division winners

2014 Race Results

Half Marathon Results by Age Groups
Half Marathon Results Overall

5K Results by Age Groups
5K Results Overall