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 ArticlesA Day of Life on the Frontier in ColoradoFind Your Perfect Fall Adventure in ColoradoFall Color Camper Van Road Trips: Part 1, Drives Near DenverFall Drives: 5 Color-Drenched Colorado Scenic Byways150 Ways to Celebrate Colorado: Spring & Summer10 Places to See Colorado's Fall Color