Lamoille Canyon Road is officially designated National Forest Road 660 (NF 660). Its southern terminus is at a large parking area in Lamoille Canyon with multiple trailheads. From here, the road winds north and then northwest through the canyon, descending from its elevation of 8,800 feet (2,700 m) at the parking area to around 6,000 feet (1,800 m) at the entrance of the canyon. Once outside of the canyon, the road continues north toward the small town of Lamoille, reaching its northern terminus west of town at an intersection with SR 227. The eastern terminus of SR 227 is located about one mile east of this location.
Throughout its length, the road is undivided and two-lanes wide (one each way) with a speed limit of 35 mph (56 km/h). The road is not plowed in the winter, when it is used for winter recreation such as cross-country skiing and snowmobiling. Motor vehicle access to the upper end of the road is generally limited to the months of June through October, though this is partly dependent on snowfall. In contrast, the section of the road below 7,000 feet (2,100 m) is usually motor-vehicle accessible for most of the year.
Points of interest
Powerhouse Picnic Area, Camp Lamoille, Thomas Canyon Campground, Changing Canyon Nature Trail, Terraces Picnic Area, and Roads End Trailhead are all located along Lamoille Canyon Road. The Roads End Trailhead is the northern terminus of the Ruby Crest National Recreation Trail.