• White Facebook Icon
  • White Twitter Icon
  • White Instagram Icon

Clo Cow Half Marathon  10K • 5K

2021 Event Update (June 3, 2021)

We had planned to open registration earlier this spring for our event on September 20, 2021 with the expectation that restrictions on events would clear and permitting agencies would once again start approving in-person events. Unfortunately, we had to wait longer than expected and there remains some uncertainty with respect to capacity restrictions in Sonoma County.

After careful consideration, we've decided to postpone the next Clo Cow Half Marathon until we can hold the event at full (or close to full) capacity, which will ensure that we can host a quality event and support our many non-profit partners. We're currently evaluating multiple options, including late 2021 and spring 2022. As soon as a new date is confirmed, we'll let you know. 

We're excited to see many local events returning this summer and fall, and we look forward to bringing the Clo Cow Half Marathon back soon. 

OTF Petaluma logo.png

Help us Support

Petaluma Educational Foundation

Impacting Local 

Education Every Day