Locomotion is an original composition by John Coltrane, written for and first recorded on his landmark 1957 album Blue Train, his only date as a leader for Blue Note Records. The session was captured at Rudy Van Gelder's studio in Hackensack, New Jersey, with a stellar hard bop ensemble featuring Lee Morgan on trumpet, Curtis Fuller on trombone, Kenny Drew on piano, Paul Chambers on bass, and Philly Joe Jones on drums. The tune is an uptempo hard bop burner cast in a modified AABA form, with 12-bar blues progressions in the A sections linked by an 8-bar bridge, giving it a blues-drenched foundation overlaid with spirited horn lines. True to its title, the composition generates relentless forward momentum, serving as an ideal vehicle for fiery collective improvisation rather than intricate harmonic exploration. Within the Blue Train session, Locomotion showcases Coltrane at full tilt alongside his bandmates in a display of ensemble energy that exemplifies the golden age of hard bop. While the album's title track and Moment's Notice have attracted more attention over the decades, Locomotion remains a rewarding deep cut from one of the most celebrated jazz albums of the 1950s, and its continued availability in transcription form reflects ongoing interest among musicians studying Coltrane's early work.