Napa Valley Endurance Run

Event

The Napa Valley Endurance Run is a trail event in Calistoga, California, held on April 12, 2026. The event offers four distances:

• 50k
• 35k
• Half marathon
• 10k

The race starts and finishes on the Great Lawn at the Calistoga Fairgrounds and routes runners into Robert Louis Stevenson State Park and up to Mount St. Helena. The 50k is a UTMB Index race; the 35k and half marathon also carry UTMB Index status. All finishers receive a medal and a race shirt. Awards are given to the top three finishers by gender in each race; races with fields larger than 50 runners also receive 10-year age-group awards.

Course and logistics

All courses use trail single track and fire road with one highway crossing at Highway 29. Key trail sections include Oat Hill Mine Trail, the Palisades Trail, Table Rock, Lasky Point, and the Mount St. Helena Trail. Reported net elevation change is approximately 7,250 feet for the 50k, 5,250 feet for the 35k, and 4,250 feet for the half marathon. Aid stations are limited by remote access; runners may encounter stretches up to about 6 miles between stations and are advised to carry water (recommended up to 40 oz) and nutrition. The 50k has three aid stations that are visited twice out-and-back for six total aid stops; the 35k has three aid stations; the half marathon has water at the bottom of Oat Hill Mine and a stocked aid at the turnaround. Drop bags are available at the Highway 29 lot and must be clearly marked. Runners who do not reach the Highway 29 aid by the specified cutoff will be moved to the shorter course and become ineligible for overall or age-group awards. Visit the organization's website for the most recent information.