Three Sisters Skyline

Event details

Three Sisters Skyline is a trail running event held Saturday, September 19, 2026, at Village Green Park in Sisters, Oregon. The event includes two distances:

• 50K
• Half Marathon

The event benefits Sisters Trail Alliance, a non-profit that plans, builds and maintains multi-user, non-motorized trails in the Sisters area. Finishers receive a finisher medal. Top three finishers in female, male and non-binary categories receive prizes from sponsors.

Course and logistics

Both races finish in Sisters. The 50K reaches the edge of the Three Sisters Wilderness, runs among Ponderosa pines, areas of forest regrowth from a 2012 fire, alpine meadows and a mountain stream. The 50K has about 3,700 ft of climbing and 4,700 ft of descent, with approximately 95% single track and three fully stocked aid stations. The half marathon is a point-to-point trail race with a net downhill of about 1,500 ft and about 500 ft of gain, roughly 85% single track and one aid station at mile 7.1.

A shuttle transports runners to the start; drop-offs at the start are not permitted because parking is limited. Warm-up clothing can be transported back from the start in the race director’s vehicle; items left on the shuttle will not be returned.

Registration and other information

Early registration price tiers apply for both distances with increases through September. Registering by August 16 guarantees shirt size. The race is held under a special use permit with Deschutes National Forest and the City of Sisters. Horses may be present on course; guidelines are provided for encounters. Visit the organization's website for the most recent information.