Napa Valley Endurance Run
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Event
The Napa Valley Endurance Run takes place in and around Calistoga, California on April 12, 2026. The event offers multiple trail distances:
- 50K
- 35K
- Half Marathon
- 10K
Races start and finish on the Great Lawn at the Calistoga Fairgrounds and run into Robert Louis Stevenson State Park and toward Mount St. Helena. The 50K, 35K, and Half Marathon are UTMB Index races. All finishers receive a custom finishers medal and a race shirt. Awards are given to the top three finishers by gender in each race; age-group awards are offered in races with more than 50 runners in 10-year divisions.
Course and logistical details
All courses are out-and-back and use single track and fire road with one Highway 29 crossing. The 50K has roughly 7,250 feet of elevation gain and loss; the 35K has about 5,250 feet; the Half Marathon has about 4,250 feet. The 50K course includes aid stations at approximately 6.5, 10.5, 14, 17, 20.6, and 25 miles. The 35K aid stations are at about 6.5, 10.5, and 15 miles. The Half Marathon has aid at mile 1, the Palisades turnaround, and mile 12. The 10K has water-only stations at mile 1 and 5.2. Because of long stretches between stations, runners are advised to carry up to 40 ounces of water. Drop bags are delivered to the Highway 29 lot and are accessible on course. Runners who do not reach the Highway 29 aid station by 11:45 may be moved from the 50K to the 35K and will not be eligible for overall or age-group awards. An RV park is available at the Calistoga Fairgrounds. Visit the organization's website for the most recent information.
