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
Where pricing applies, shown amounts include mandatory charges, items, and fees.
Hiker Half Marathon
Price changes in 9 months 5 days-
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Register for Hiker Half Marathon$98.33Now registering Apr 16 – Jan 24
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$103.66Jan 25 – Mar 10
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$109.00Mar 11 – Apr 3
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50K
Price changes in 9 months 5 days-
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Register for 50K$159.17Now registering Apr 16 – Jan 24
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$169.85Jan 25 – Mar 10
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$180.52Mar 11 – Apr 3
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HALF MARATHON
Price changes in 9 months 5 days-
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Register for HALF MARATHON$105.80Now registering Apr 16 – Jan 24
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$111.14Jan 25 – Mar 10
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$116.47Mar 11 – Apr 3
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10K
Price changes in 9 months 5 days-
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Register for 10K$86.58Now registering Apr 16 – Jan 24
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$91.92Jan 25 – Mar 10
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$97.26Mar 11 – Apr 3
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5K
Price changes in 9 months 5 days-
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Register for 5K$76.98Now registering Apr 16 – Jan 24
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$82.31Jan 25 – Mar 10
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$87.65Mar 11 – Apr 3
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REMOTE RUNNER
Price changes in 11 months 6 days-
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Register for REMOTE RUNNER$50.29Now registering Apr 16 – Mar 25
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$55.63Mar 26 – Apr 3
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BBQ ticket
Registration closes in 11 months 15 days-
BBQ lunch plate from Slow Hand BBQ
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Register for BBQ ticket$23.60Now registering Apr 16 – Apr 3
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Event schedule
- Sat, April 3, 2027 6:30 AM - 50K RACE START
- Sat, April 3, 2027 8:30 AM - HALF MARATHON RACE START
- Sat, April 3, 2027 9:00 AM - 10K RACE START
- Sat, April 3, 2027 9:30 AM - 5K RACE START
Contact information
- Event contact
- Jasmin Fiandaca
- Website
- Visit website
