This bike ride travels between Challis and Stanley on State Highway 75, and the route is part of the Salmon River Scenic Byway. The ride starts in Challis and goes south on highway 93, and then connects to Highway 75 within 3 miles. The route climbs very gradually as it follows alongside the Salmon River. Expect a lot curves, numerous areas with steep grades, and a very limited shoulder width. The route one way is about 58 miles, so be sure to plan ahead if you want to shuttle back or stay overnight somewhere.