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 Spots remaining: 24
Price changes in 2 days 14 hours-
Includes T-Shirt, Cowbell medal, Post-race food
-
$88.58
$82 + Processing Fee
Mar 21 – Apr 30 -
$92.84
$86 + Processing Fee
May 1 – Jul 31 -
Register for Half Marathon$99.23
$92 + Processing Fee
Now registering Aug 1 – Sep 30 -
$104.56
$97 + Processing Fee
Oct 1 – Oct 12
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10K Spots remaining: 18
Price changes in 2 days 14 hours-
Includes T-Shirt, Cowbell medal, Post-race food
-
$67.28
$62 + Processing Fee
Mar 21 – Apr 30 -
$71.54
$66 + Processing Fee
May 1 – Jul 31 -
Register for 10K$77.93
$72 + Processing Fee
Now registering Aug 1 – Sep 30 -
$82.19
$76 + Processing Fee
Oct 1 – Oct 12
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5K Sold out
Price changes in 2 days 14 hours-
Includes T-Shirt, Cowbell medal, Post-race food
-
$49.18
$45 + Processing Fee
Mar 21 – Apr 30 -
$54.50
$50 + Processing Fee
May 1 – Jul 31 -
$59.83
$55 + Processing Fee
Now registering Aug 1 – Sep 30 -
$65.15
$60 + Processing Fee
Oct 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 | Jackie Magliari | $107.35 |
| 3 | Trang Nguyen | $107.35 |
| 4 | Geri Johnston | $54.10 |
| 5 | Anonymous | $54.10 |
| 6 | Claire Killefer | $27.48 |
Digital engagement kits
Digital engagement kits may give you access to exclusive content, contests, discounts, offers, and other information from our partners, sponsors, and more!
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
