Clo Cow Half Marathon, 10K & 5K

Experience the charming blend of urban and rural landscapes at the Clo Cow Half Marathon, 10K, and 5K on October 11, 2026. This race weaves through Historic Downtown Petaluma and expansive farmland, offering runners a unique journey filled with picturesque views.
Race morning is set for mild temperatures, averaging around 64°F (17.9°C), with lows ranging between 52.7°F to 75.8°F (11.5°C - 24.3°C). The air feels just right at a humidity level of 71%, though a gentle breeze with an average speed of 8.4 km/h may add some challenge to your pace.
The event, now in its several-year run, continues to attract runners due to strong local community support. Each year, over one thousand participants gather to celebrate Petaluma's vibrant spirit and natural beauty through scholarships and charity programs. The race features a variety of terrain with firm yet slightly soft trail conditions, perfect for both experienced runners and newcomers.
The 10K (6.2 miles), Half Marathon (13.1 miles), and 5K (3.1 miles) courses offer sweeping views from gentle climbs that reward every step. The race begins in Downtown Petaluma with a gradual elevation gain followed by some level stretches before returning to the finish line at the same location.
Aid stations are strategically placed along the route, providing water and snacks for your energy needs. With an UV index of 4 (moderate), sunscreen is recommended to protect against sun exposure during your run.
Race times start at 07:30 AM across all distances:
- The 10K costs $68.35
- The Half Marathon costs $91.78
- The 5K costs $50.24
Register early by visiting https://raceroster.com/events/2026/115095/clo-cow-half-marathon-10k-and-5k before August 31, 2026, to enjoy the early bird registration fee.
Bib pickup is available at Petaluma City Hall from September 1 to October 9, 2026, during business hours with a valid photo ID. First-timers should arrive prepared: bring water or sports drink, wear comfortable running gear, and ensure you have appropriate footwear for the firm yet slightly soft trail conditions.
The Clo Cow Half Marathon, 10K & 5K promises an unforgettable experience through picturesque Petaluma while supporting local community initiatives.