October 12, 2025
Join us on October 12, 2025 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!
Registration fees
Prices are inclusive of mandatory charges, items, and fees
Half Marathon
Price changes in 1 month 21 days-
Includes T-Shirt, Cowbell medal, Post-race food
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$88.58Mar 21 – Apr 30
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$92.84May 1 – Jul 31
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Register for Half Marathon$99.23Now registering Aug 1 – Sep 30
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$104.56Oct 1 – Oct 12
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10K
Price changes in 1 month 21 days-
Includes T-Shirt, Cowbell medal, Post-race food
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$67.28Mar 21 – Apr 30
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$71.54May 1 – Jul 31
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Register for 10K$77.93Now registering Aug 1 – Sep 30
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$82.19Oct 1 – Oct 12
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5K
Price changes in 1 month 21 days-
Includes T-Shirt, Cowbell medal, Post-race food
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$49.18Mar 21 – Apr 30
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$54.50May 1 – Jul 31
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Register for 5K$59.83Now registering Aug 1 – Sep 30
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$65.15Oct 1 – Oct 12
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Youth Discount
Registrants under 18 receive a $10 discount at checkout (applies to all distances)
Top donors
| No. | Name | Amount |
|---|---|---|
| 1 | Marcia Keasler | $107.35 |
| 2 | Geri Johnston | $54.10 |
| 3 | Anonymous | $54.10 |
| 4 | Claire Killefer | $27.48 |
| 5 | Leah Canvasser | $27.48 |
| 6 | Anonymous | $27.48 |
Event schedule
- Sun, October 12, 2025 7:30 AM - Half Marathon Start
- Sun, October 12, 2025 7:35 AM - 10K Start
- Sun, October 12, 2025 7:45 AM - 5K Start
Contact information
- Event contact
- Chris Mason
- Website
- Visit website
