We are pleased to announce that the 42nd Mt. Diablo Challenge Ride will be held on Sunday, October 5, 2025​

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The 11.2-mile, individually timed ride climbs 3,249 feet to the summit of Mt. Diablo starting up South Gate Road. Mt. Diablo is one of the highest peaks in the San Francisco Bay Area, with views of the Farallon Islands and the Sierras. The road is closed for safety and more than 800 cyclists will ride to the summit. The ride welcomes all ages, abilities, teams, and bicycle types. It will be a once-a-year opportunity to enjoy riding the mountain without cars. Everyone celebrates after the ride with free BBQ, prizes, awards, and live music. Come participate in this epic ride that provides breathtaking scenery and test your climbing ability.