 SH 74 passes through many of Denver 's mountain parks , including Bergen Park and Dedisse Park . Established in 1909 by Colorado governor Robert W. Speer , the system encompassed several areas west of the city , comprising the first city @-@ owned park system in the world . SH 27 , as the Bear Creek Canyon Scenic Mountain Drive was designated at the time , ran past the Denver Motor Club in Idledale in addition to newly purchased parks . During the 1910s , Denver was granted the ability to enforce laws pertaining to these parks ; a speed limit of 20 miles per hour ( 32 km / h ) was set along the roadway uphill and 15 miles per hour ( 24 km / h ) downhill . In one of the parks , Red Rocks Park near Morrison , a CCC camp was established in 1935 as part of a New Deal work relief program . The enlistees here built a large amphitheater in the park . Numbered camp SP @-@ 13 @-@ C , it is the only CCC camp left in the state . Both the camp and the section of SH 74 between Idledale and Morrison , known as the Bear Creek Canyon Scenic Mountain Drive , are listed on the National Register of Historic Places . 
