 An early road following the current path was established in the late 19th century for miners and loggers . As floods ravaged the road along Bear Creek through the early 20th century , measures were taken to prevent further damage . Other sites along Bear Creek , such as a Civilian Conservation Corps ( CCC ) camp in Red Rocks Park and the Bear Creek Canyon Scenic Mountain Drive , as the section between Idledale and Morrison is called , have given the route a listing on the National Register of Historic Places . An early designation of the route number went further west than its current @-@ day designation ; that section was truncated by the late 1930s . Another eastern segment was added from Morrison east toward Denver in the 1940s , but that section too was removed . Newer improvements to the road include widening the Evergreen Parkway segment to four lanes and constructing an interchange with I @-@ 70 . 
