With a start and finish in Challis, Idaho, the River of No Return (RONR) Endurance Runs offer runners a unique opportunity to experience Idaho’s remote beauty. Choose between distances of 25k, 50k, or 108k, where you’ll be challenged by varying terrain and awed by gorgeous scenery. Cradled by the Salmon River to the south and the Frank Church Wilderness to the north, the RONR Endurance Runs provide participants the chance to see – among other sites – Blue Mountain, the Lombard Trail, Bayhorse Lake, and an old stage coach trail.

Race Website: http://runchallis.com/