East of Eagle, Highway 55 turns northward and climbs to the Spring Valley and over the Spring Valley Summit, at , then descends vertically on Horseshoe Bend Hill into Horseshoe Bend. The new multi-lane grade was completed in fall 1991; the old curvier road is to the west, long plagued by landslides and closures. North of Horseshoe Bend, the highway ascends the Payette River and passes through several recreational areas, which offer rafting, fishing, and camping activities. Highway 55 continues north, through the small communities of Banks and Smiths Ferry, then crosses the river via the Rainbow Bridge (built in 1933), originally known as the North Fork Bridge.