Calistoga Mountain Run
Calistoga, United States • 12 Apr 2026
Event overview
The Napa Valley Endurance Run on April 12, 2026, is a trail running event in Calistoga, California. The event offers four distances:
- 50K
- 35K
- Half Marathon
- 10K
The start and finish are on the Great Lawn at the Calistoga Fairgrounds. Courses use trails in Robert Louis Stevenson State Park and reach Mount St. Helena and Oat Hill Mine. The route is an out-and-back made up of single track and fire road with one crossing of Highway 29.
Course, aid and cutoffs
The 50K has a net elevation gain and loss of about 7,250 feet. The 50K course passes aid stations located near miles 6.5, 10.5, 14, 17, 20.6 and 25. These stations are described as fully stocked. The 35K has aid stations at roughly miles 6.5, 10.5 and 15. The Half Marathon has aid at mile 1, the Palisades turnaround aid, and mile 12; the mile 1 and 12 stations provide water and gels. The 10K has water-only stations near mile 1 and mile 5.2.
Because some trail sections have limited access, there can be long stretches between aid stations and runners are advised to carry water. Drop bags are delivered to the Highway 29 aid location and can be accessed twice; they must be clearly marked. Runners on the 50K who do not reach the Highway 29 aid by the stated time will be moved to the 35K course and will not be eligible for age-group or overall awards. A hard cutoff at the Highway 29 turnaround is applied on the return. Visit the organization's website for the most recent information.