Coolest 10km Trail Run
Cool, United States • 6 Jun 2026
Coolest 10km Trail Run
The Coolest 10km Trail Run takes place in Cool, California, within the Auburn State Recreation Area. The event features a single distance:
- 10 km Trail Run
The course consists of a 6 mile loop on the Olmsted Trail. This route parallels Highway 49 and the American River Canyon, leading through open, rolling hills populated with several species of oak trees. During the spring, the landscape also features various wildflowers. The terrain includes steep canyon climbs and descents as the trail crosses both Knickerbocker and Salt Creeks.
The elevation for this run ranges from 1,229 feet to 1,529 feet. The vertical gross measurement is recorded as +799 feet and -795 feet. The event is held in conjunction with the Coolest Ride and Tie.
Participants have access to a fully staffed aid station located at approximately mile 3 of the loop. This station provides Hammer Nutrition products for hydration and fueling. The event start and parking areas are situated at the Olmstead Trailhead, located behind the local fire station. Registration for the run remains open until early June. Visit the organization's website for the most recent information.