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Diablo Trails Challenge 2019
50K, 1/2 Marathon, 10K, 5K


***ONLINE REGISTRATION NOW CLOSED.  RACE DAY REGISTRATION WILL OPEN AT 6:10 AM*** 


For over 40 years, Save Mount Diablo has worked tirelessly to preserve and increase the open space on and around Mount Diablo. In that time, their efforts have taken us from 6,788 acres of open space to over 100,000 acres of open space on and around the mountain!

With distances suitable for everyone from those hitting the trails for the first time to experienced ultra-runners, the Diablo Trails Challenge was created to help celebrate and support these achievements. A portion of all entry fees will go to Save Mount Diablo to help them continue preserving open space and trails for all of us to enjoy.

Registration fees

50K Closed

    1. $115.00
      May 1 – Feb 18
    2. $120.00
      Feb 19 – Mar 18
    3. $125.00
      Mar 19 – Apr 12

HALF MARATHON Closed

    1. $74.00
      May 1 – Feb 18
    2. $79.00
      Feb 19 – Mar 18
    3. $84.00
      Mar 19 – Apr 12

10K Closed

    1. $53.00
      May 1 – Feb 18
    2. $58.00
      Feb 19 – Mar 18
    3. $63.00
      Mar 19 – Apr 12

5K Closed

    1. $48.00
      May 1 – Feb 18
    2. $53.00
      Feb 19 – Mar 18
    3. $58.00
      Mar 19 – Apr 12

REMOTE RUNNER Closed

    1. $40.00
      May 1 – Mar 18
    2. $45.00
      Mar 19 – Apr 12

BBQ ticket Closed

  • BBQ lunch plate from Slow Hand BBQ

    1. Registration closed

Event Schedule

  • April 13 6:30 AM PDT - 50K RACE START

  • April 13 8:30 AM PDT - HALF MARATHON RACE START

  • April 13 9:00 AM PDT - 10K RACE START

  • April 13 9:30 AM PDT - 5K RACE START

Contact Information

Event Location

1700 Castle Rock Road, Walnut Creek, CA, United States

Click here to view map