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 ArticlesQuick Guide to Colorado's Scenic & Historic Byways8 More Ways to Experience Colorado HistoryColorado Scenic Byway: Flat Tops TrailColorado Day Trips: Short Trips from DenverColorado Scenic Byway: Santa Fe Trail2 Days in the San Luis Valley & Great Sand Dunes National Park