Jasper Mountain Trail Fest

Event overview

Jasper Mountain Trail Fest takes place on June 20, 2026 in Dayton, Washington. The event raises funds for Jasper Mountain Reserve, a 501(c)(3) nonprofit that supports habitat conservation for rare and endangered plants and animals in the Blue Mountains. The start and finish are at 934 Payne Hollow Road, Dayton, WA 99328.

Distances and course

• 100 km 5-person relay (team of 5 sharing one bib)
• 13.1 miles Half marathon (single loop combination)
• 26.2 miles Full marathon (combined loops run twice)
• 4.4 miles Family Run on the Green Loop

All races take place on three single-track loops: Red Loop (3.3 miles), Green Loop (4.4 miles), and Black Loop (5.4 miles). The three loops combined equal 13.1 miles. Relay teams rotate the single bib so each member completes all three loops; race timing will provide team results and individual splits. The relay is expected to take about 10–15 hours. Headlamps are required for runners after dusk.

Logistics and on-site facilities

Parking and campsites near the start/finish are included in the registration fee. The reserve is off-grid; there is no water or electricity on site. Portable sanitary facilities will be provided. Quiet rules apply in the reserve, dogs must be on leash, and camp-fires are allowed only in a designated area. Accommodation options are available in nearby towns. Visit the organization's website for the most recent information.