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Ultramarathon Races in Castro Valley

Find Ultramarathon running races in Castro Valley. Browse upcoming ultramarathon events, registration details, and race information for 2026.

1 race found

Trail

Dick Collins Firetrails

26 Sept 2026
Castro Valley, United States
100km · Ultra

Dick Collins Firetrails is a 100 km ultramarathon trail race held in Castro Valley, CA. The event takes place in September 2026.

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