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Event Info

Race Day: September 22, 2024

The 12th running of the Clo Cow Half Marathon, 10K & 5K is set to return to Historic Downtown Petaluma.  Our beautiful half marathon course will take you through rural Sonoma County farm country, over rolling hills where you'll be cheered on by sheep, horses, and of course our beloved Moo-Cows! The trip out there is a challenging one, but the inclines just make the views even more rewarding!

Start Times

Half marathon starts at 7:30 am

10K starts at 7:35 am

5K starts at 7:45 am


Please arrive early, allowing plenty of time before your start time. 

Location & Parking

All races share a common start / finish line, located on Kentucky Street between 'B' Street & Western Avenue.  Free parking is available on the surrounding streets and in two nearby parking garages.  Please do not park in private parking lots or anywhere along the course.  ​

Participant Benefits

​All participants receive a professionally organized race on an accurate course with fast and reliable results using the latest timing technology. A free sweat check will be available to all registered participants. 

All Participants Receive:

  • Custom cowbell finisher medal​

  • Performance T-Shirt (gender specific) 

  • Athlete photo package for sale

  • Well stocked aid stations

  • Post-race food 

  • Clover Sonoma chocolate milk



Athlete photos will be taken during the warm up, on the course and at the finish line.  Please make sure your bib number is clearly visible so we can match your photos.  You will receive an email approximately two days after the race when your photos are ready to be downloaded.




Overall: Top 1st, 2nd & 3rd male & female in the half marathon.


5-Year Age ​Groups - Awards TBD



Timing provided by Capital Road Race Management, utilizing ChronoTrack RFID technology.


Race Rules

Course Time Limit: Half Marathon participants are required to complete the course in 3:30.


Spectators: The best place to watch the race and cheer on runners is near the start/finish line.  For the safety of all participants, spectators are not allowed to drive onto the race course.  Traffic will be limited to residents only. 


Course Safety: Please be aware that the course is monitored, but not closed to local traffic.  The use of iPods and other music players is highly discouraged.  Because the course is an out and back, we ask that all participants stay to the right shoulder of the road (unless directed otherwise by course marshals or police). 


Bib Number: Pin your bib number on the front of your shirt so that it's visible to race photographers and finish line personnel.


Strollers & Pets: Due to safety concerns, strollers and pets are not permitted on the race course.



​Non-Profit Partners

The following organizations benefit from the Clo Cow Half Marathon:

  • Petaluma Educational Foundation

  • Casa Grande H.S. Cross Country

  • Healdsburg H.S. Cross Country

  • North Bay Rowing Club

  • Miwok Valley Elementary School

  • Casa Grande H.S. Track & Field 

  • Casa Grande H.S. Mountain Bike Team

  • River Town Racers

We're looking for additional non-profit partners for our next event.  If your organization is interested in participating as a volunteer group, please contact us

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