Napa Valley Endurance Run

The Napa Valley Endurance Run is a challenging trail running event held in Calistoga, California, starting and finishing at the Calistoga Fairgrounds. It offers four race distances: 50k, 35k, half-marathon, and 10k, all traversing scenic single-track and fire road trails through Robert Louis Stevenson State Park and up to Mount St. Helena.

The 50k race features over 7,500 feet of elevation gain, making it one of California's toughest mountain races and a UTMB Index event. Aid stations are well-stocked but spaced with long stretches, so runners are advised to carry ample water. The race atmosphere combines rugged mountain terrain with the charm of Napa Valley, concluding with food, awards, and festivities in Calistoga. Visit the organization's website for the most recent information.