 State Highway 74 ( SH 74 ) is a state highway in the U.S. state of Colorado . Running 18 miles ( 29 km ) from Interstate 70 ( I @-@ 70 ) in El Rancho to SH 8 in Morrison , the highway roughly follows a hook @-@ shaped path running northwest – southeast . The section of the route north of the junction with SH 8 is also known as South Platte Parkway .
SH 74 was designated in 1937, running from SH 8 to SH 84 . In 1961, the section from SH 8 to SH 84 was deleted, and the