Half Marathon · Castro Valley
Half Marathons in Castro Valley, CA
Every half marathon happening in or near Castro Valley, California. Sorted by date with deterministic 0–100 scores so you can pick the right one for your goal.
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Half Marathon
Sun, Jun 7, 2026
Castro Valley, California
trail
Rolling
30PR40value55vibe
scenic
Half Marathon
Fri, Jun 26, 2026
Castro Valley, California
trail
Rolling
30PR40value55vibe
beer
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