Road running

Clo-Cow Half Marathon & 5K

📅 October 10, 2027 (estimated date)📍 Petaluma · United States

⚠️ 2027 edition: provisional information

The date is estimated from the 2026 edition (October 11, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.

Available distances

13.1 mi6.2 mi3.1 mi

About

The Clo-Cow Half Marathon & 5K takes place in historic downtown Petaluma on October 10, 2027, with three distances: the Clo-Cow Half Marathon (13.1 miles / 21.1 km), the Clo-Cow 10K (6.2 miles) and the Clo-Cow 5K (3.1 miles). The course showcases the rural landscapes and rolling hills of Sonoma County.

Participants can count on a well-organized race with accurate timing technology. Proceeds from the event support a range of local organizations.

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