2021 (Virtual) Lake Chabot Trail Challenge

Fri June 4 - Sun June 27 Directions RaceJoy Ready
Address for Lake Chabot: 17404 Lake Chabot Rd, Castro Valley, CA 94546

From the parking lot, just follow the signs to the registration and starting lines.

RACE INFO: Join us this year for a virtual event. It is the the 37th annual Lake Chabot Trail Challenge Half Marathon, 10K and 5K.  We added a 10K this year to allow for others who would like to do more than a 5K but less than a half marathon. You will have 3 weeks to complete the course you registered for. It will begin Friday, June 4th through Sunday, June 27th, 2021. The race will take place rain or shine and there are no refunds. This is a virtual race event but the course is on-site. 

RACE COURSE: (Update on the race course this year. We will be removing Loggers Loop for safety reasons. This half marathon is short of slightly a mile). 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 will not be any support or water stations, so we recommend bringing your own hydration. The 10K loop is what we like to call figure 8. You will have one little loop of the Ten Hills Trail then into a bigger loop on East Shore Trail along the beautiful lake.  The 5k (3.1 miles) course is an out and back that has gentle rolling hills and consists mostly of paved surfaces.  

RACE FEE: Pre-registered runners will be guaranteed a t-shirt if registered by Sunday, May 9th, 2021.  The price for the 5K is $35; 10K is $45 and Half Marathon $50. You must register by Sunday, June 6th. 

RACE PACKET PICK-UP:  There will be several opportunities to pick up your race packet. See dates, times and location below. 

  • Friday, June 4th, 11th & 18th from 3:30-6:30pm at Lake Chabot Public Market, 18911 Lake Chabot Rd, Castro Valley, CA 94546
  • Saturday, June 5th, 12th & 19th from 8:30am-12:00pm at Lake Chabot Public Market, 18911 Lake Chabot Rd, Castro Valley, CA 94546

T-SHIRT: Entry fee includes short sleeve t-shirts for registrations by May 9th so sign-up early.  There are no guarantee of t-shirts for runners registered after that date.

AWARDS: We are confident that you will complete the course you registered for. Part of the race packet will include a finisher's medal. This year, we will not be giving any age division medals as we've done in previous years. We will definitely bring that back once this event is back to in-person. We apologize in advance for that. .

QUESTIONS: If you have any questions, please contact Rachel Lunt at teamlunt07@gmail.com.

DIRECTIONS: The entrance closest to the event's parking lot is: 17404 Lake Chabot Road, Castro Valley, CA 94546.  On Google Maps, this will appear as "Entry of Lake Chabot Parking Space."  The registration area and start lines are just a few minutes walk from the lot ( just follow the signs).  

Race Contact Info

If you have any questions about this race, click the button below.


Castro Valley Sports Foundation (CVSF) was founded in 2002, all volunteer-based, non-profit 510(c)(3) California organization that provides charitable assistance and support youth sports and athletics in Castro Valley. This fundraiser event and any sponsorship dollars will go directly to help widen and sustain sports participation in our community.

As CVSF pursues its commitment to raise funds for sports and athletics in Castro Valley, here is how CVSF has given back to the community:

In  2010, the CVSF donated $26,500 to the CVUSD to help fund all sports at CV high school and closed a CVUSD budget gap of over $250,000 that otherwise would have eliminated all high school sports at Castro Valley High School for 2010-2011 school year. 

In 2008, the CVSF donated another $16,500 to various interscholastic sports programs at Castro Valley High School. The money was distributed in 17 grants ranging in value from $300 to $1,500 and included all girls and boys programs such as: storage container for track and field, electronic scoreboard for wrestling, pitching machine for girls' softball, place clock for swimming, helmets for football, and training equipment for soccer.

In 2007, the CVSF donated $4,500 for the purchase of a portable batting cage for the CVHS baseball program. 

The CVSF donated more than $180,000 towards the CVHS football stadium project 

Most recently between 2011 – 2020, CVSF has donated between $15,000 - $28,000 yearly through the grant program to different youth sports organizations and teams from CV Little League, Canyon/Creekside Middle School Tennis Program, Elementary Schools Track Programs, CV Track Club, CVSC Top Soccer Program and numerous CVHS sports programs.

CVSF invites local businesses to become a sponsor for this event. For sponsorship details, please contact Rachel Lunt at teamlunt07@gmail.com.

Half Marathon Course

Click the icon below to download the attached PDF.

5k course map

Click the icon below to download the attached PDF.

10K Course Map

Click the icon below to download the attached PDF.


Available for Apple and Android devices.

Interactive Race Day Experience with RaceJoy

Live Phone Tracking, GPS Progress Alerts and Cheers!

We are providing you with RaceJoy as part of the official race experience for the 2021 (Virtual) Lake Chabot Trail Challenge.

Download the RaceJoy mobile app in advance to ensure proper phone setup. Invite your friends and family to track you and send you cheers!

Some key RaceJoy features include:

GPS Progress Alerts

  • Receive continual progress updates as you complete your goal.

Live GPS Tracking

  • Remote spectators can track your progress live in a map view. You can also track others.


  • Receive supportive audio cheers from remote friends & family.

Virtual Results (virtual events only)

  • Enter your race-assigned bib number to automatically submit your finish data for real-time scored results.
To use RaceJoy, you must carry your phone and activate tracking on the day you complete your race.
View RaceJoy How-To

Address for Lake Chabot: 17404 Lake Chabot Rd, Castro Valley, CA 94546

From the parking lot, just follow the signs to the registration and starting lines.


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