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
Prices are inclusive of mandatory charges, items, and fees
50K
Price changes in 5 months 16 days-
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$159.17Now registering Jun 10 – Jan 25
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$169.85Jan 26 – Mar 11
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$180.52Mar 12 – Apr 4
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HALF MARATHON
Price changes in 5 months 16 days-
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$105.80Now registering Jun 10 – Jan 25
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$111.14Jan 26 – Mar 11
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$116.47Mar 12 – Apr 4
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10K
Price changes in 5 months 16 days-
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$86.58Now registering Jun 10 – Jan 25
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$91.92Jan 26 – Mar 11
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$97.26Mar 12 – Apr 4
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5K
Price changes in 5 months 16 days-
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$76.98Now registering Jun 10 – Jan 25
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$82.31Jan 26 – Mar 11
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$87.65Mar 12 – Apr 4
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REMOTE RUNNER
Price changes in 7 months 14 days-
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$50.29Now registering Jun 10 – Mar 23
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$55.63Mar 24 – Apr 4
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BBQ ticket
Registration closes in 7 months 26 days-
BBQ lunch plate from Slow Hand BBQ
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$23.60Now registering Jun 10 – Apr 4
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Event schedule
- Sat, April 4, 2026 6:30 AM - 50K RACE START
- Sat, April 4, 2026 8:30 AM - HALF MARATHON RACE START
- Sat, April 4, 2026 9:00 AM - 10K RACE START
- Sat, April 4, 2026 9:30 AM - 5K RACE START
Contact information
- Event contact
- Jasmin Fiandaca
- Website
- Visit website