1 event in Petaluma, California

From big races to Saturday morning group runs—find half marathon events and connect with the local endurance sports community.

• Clo Cow Half Marathon, 10K & 5K [clocowhalf.com] [Register at raceroster.com]
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  Sun, Oct 11, 2026 at 7:30 AM

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  October 11, 2026

  Join us on October 11, 2026 for the Clo Cow Half Marathon, 10K & 5K in charming Historic Downtown Petaluma! Wind your way through picturesque Sonoma County farmland and rolling...

  October 11, 2026

  Join us on October 11, 2026 for the Clo Cow Half Marathon, 10K & 5K in charming Historic Downtown Petaluma! Wind your way through picturesque Sonoma County farmland and rolling hills, where friendly sheep, horses—and of course Moo-Cows—will cheer you on every step of the way. Sure, those climbs are a challenge, but the sweeping country views at the top are well worth the effort!

  5k 10k 21k Half Marathon Run

  35 Kentucky Street, Petaluma, California, 94952, United States
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