"Eight Miles High" is a song by Gene Clark, Jim McGuinn, an David Crosby, first appearing as a single from 1966 by the rock band The Byrds. The single peaked at #14 on the Billboard Hot 100, and was included as well on their album Fifth Dimension, released on July 18, 1966. In tandem with its b-side, "Why," written by McGuinn and Crosby, the song was instrumental in ushering in a new strain of rock and roll in the mid-1960s, that of psychedelic rock.