River Of No Return Endurance Runs
⚠️ 2027 edition: provisional information
The date is estimated from the 2026 edition (June 20, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.
Available distances
Races on the programme
| Race | Distance | Start |
|---|---|---|
| 108K | 67.1 mi | 05:00 |
| 55K | 34.2 mi | 06:30 |
| 32K | 19.9 mi | — |
About
The River of No Return Endurance Runs take place on Saturday, June 19, 2027, around Challis, Idaho, on mountain trails cradled by the Salmon River to the south and the Frank Church Wilderness to the north, with big climbs over 8,000 and 9,000 feet.
Runners choose from three trail distances: the 108K (about 67 miles, 5:00 a.m. start), the 55K (about 34 miles, 6:30 a.m. start) and the 32K (about 20 miles). The 108K and 55K start and finish at Challis City Park, while the 32K starts at the Bayhorse ghost town and finishes at the same park.
Highlights
- Mountain
- Off-road
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Races nearby
Other upcoming races around Challis.