Top of the Rockies - Scenic and Historic Byway Top of the Rockies - Scenic and Historic Byway, Red Cliff, CO, 80461(800) 933-3901WebsiteOverviewDesignated a National Scenic Byway in 1998. Related ArticlesSpring Drives: Colorado Mountain PassesColorado Scenic Byway: Flat Tops TrailColorado Scenic Byway: Mount Blue Sky2 Days in the San Luis Valley & Great Sand Dunes National ParkOld West, New Adventure Just 20 Miles West of Denver 10 Colorado Motorcycle Rides