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Half Marathon Races in Castro Valley, California

Explore Half Marathon events in Castro Valley, California.

Top Events

Green Valley Lake 5k/10k/& Half Marathon

Green Valley Lake 5k/10k/& Half Marathon

5K10KHalf-Marathon

Green Valley Lake, CA

Date TBD

8:30 AM PDT

Halloween Havoc 5k, 10k, And Half Marathon

Halloween Havoc 5k, 10k, And Half Marathon

5K10KHalf-Marathon

Fountain Valley, CA

Date TBD

7:00 AM PDT

Lake Chabot Trail Run

Lake Chabot Trail Run

5KHalf-MarathonUltra

Castro Valley, CA

Date TBD