Calistoga Mountain Run

Calistoga, United States • 12 Apr 2026

Event details

The Calistoga Mountain Run (formerly Napa Valley Endurance Run) takes place in Calistoga, California, with start/finish activity on the Great Lawn at the Calistoga Fairgrounds. The event offers the following distances:

  • 50K
  • 35K
  • Half Marathon
  • 10K

The 50K, 35K, and Half Marathon are UTMB Index races. All finishers receive a custom finisher medal and a race shirt. Awards are given to the top three finishers by gender in each race; races with fields over 50 entrants also have 10-year age-group awards.

Course and logistics

All courses are out-and-back trail routes that mix single track and fire road and include one Highway 29 crossing. Trails named on the courses include Oat Hill Mine Trail, Palisades Trail, Table Rock Trail, and Mount St. Helena Trail. The 50K has about 7,250 feet of elevation gain; the 35K and Half Marathon list net gains of 5,250 and 4,250 feet, respectively. The routes include technical sections where hands may be used.

Aid and support: 50K runners visit aid stations six times (three stations out-and-back); 35K has three stations; the Half Marathon has aid at the turnaround and minimal water at one trailhead; the 10K has water-only stations at mile 1 and mile 5.2. Because of remote sections, there can be long gaps between stations and runners are advised to carry up to 40 oz of water. Drop bags are delivered to the Highway 29 lot and must be clearly marked. Runners who do not reach the Highway 29 aid station by the posted cutoff time will be moved to the shorter course and will not be eligible for overall or age-group awards. Visit the organization's website for the most recent information.

Race information

UTMB 20K UTMB 50K
50 km
50k
35 km
35k
Half Marathon
1/2 Marathon
10 km
10k
Visit the organization's website for the most recent information.
Trail runs nearby

Scenic single track trails, hills and streams in Bothe Napa Valley State Park near Saint Helena host marathon, half and 10K races on March 21, 2026. Limited to 300 runners, the event offers T shirts and medals for the marathon and half.

Run scenic trails at Lake Sonoma near Healdsburg with 100K, 50K or the Trail Sisters women only half marathon that finishes at the Visitor Center. Expect big climbs, lake overlooks, strong aid support and a celebratory finish.

Run the scenic trails of Annadel State Park at the Annadel Half Marathon in Santa Rosa on April 18, 2026, with half marathon, 10K, and 5K options for all paces. Proceeds support Trione Annadel State Park and Sonoma County Parks Foundation.

Join Tails & Trails on May 3, 2026 in Windsor, CA for a charitable walk and run supporting Dogwood Animal Rescue. Choose a 5K, the family friendly Dogwood Dash, or participate virtually while helping animals in need.