Jasper Mountain Trail Fest
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Jasper Mountain Trail Fest 2026 : overview
The event takes place on June 20, 2026 in Dayton, WA at 934 Payne Hollow Road. It is a fundraising trail event that benefits Jasper Mountain Reserve, a 501(c)(3) environmental nonprofit working to improve wildlife habitat in the Blue Mountains of southeast Washington.
Distances and course
- 100 km - 4-person relay
- 13.1 miles - half marathon, 2,570 ft elevation gain
- 26.2 miles - full marathon, 5,140 ft elevation gain
- 4.4 miles - 7k Family Run, minimal elevation gain
Races use three single-track loops: Red 3.3 miles, Green 4.4 miles, and Black 5.4 miles. The three loops combined equal 13.1 miles; the full marathon runs that combined course twice. The relay uses teams of four sharing one bib on an adjustable belt; team members exchange the bib as they complete assigned loops. Organizers provide team and individual split timing. The relay is expected to take about 10-15 hours and headlamps are required for runners after 8:00 PM because of rugged terrain.
Logistics and accommodations
Parking and campsites near the start/finish are included in the race fee. Campsites are within the reserve, which is off-grid (no water or electricity); portable sanitary facilities are provided. Participants must bring food, water, and battery power; collect and remove all trash on departure. Dogs must be on leash, loud noises are prohibited, and campfires are allowed only in one designated area subject to local restrictions. Nearby towns with additional lodging options include Dayton (11 miles), Waitsburg (16 miles), and Walla Walla (37 miles). Visit the organization's website for the most recent information.