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 ArticlesColorado Scenic Byway: Dinosaur DiamondColorado Day Trips: Short Trips from DenverColorado Hidden Gem: Phantom Canyon Road8 More Ways to Experience Colorado HistoryColorado Scenic Byway: Santa Fe TrailQuick Guide to Colorado's Scenic & Historic Byways