Spar Canyon Road showcases the high desert beauty of the Challis region, providing smooth access to a network of OHV trails. Though unpaved, the road is well-graded and comfortable, especially beyond the rocky sections near the highway. Along the route, you'll find plenty of spur trails, occasional cattle traffic, and possible wild horse sightings. The journey takes you through small rock canyons with stunning views at every turn. The road serves as the primary access for the Northern Boulder Mountain peaks and can be reached from US-93 to the east or East Fork Salmon River Road to the west. Be mindful that it is not maintained in the winter and can be challenging in wet or snowy conditions due to potential flash floods.