Napa Valley Endurance Run

Calistoga, United States • 12 Apr 2026

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 and rugged terrain through Robert Louis Stevenson State Park and up to Mount St. Helena.

The courses feature steep climbs, technical single-track trails, and expansive views of Napa Valley, with the 50k boasting over 7,500 feet of elevation gain. Aid stations are well-stocked but spaced widely, requiring runners to carry ample water. The event is a UTMB Index race and is known as one of California’s toughest mountain trail races, attracting serious endurance runners. Visit the organization's website for the most recent information.

Race information

Visit the organization's website for the most recent information.
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