"Chestnut Mare" is a song by the American rock band the Byrds, written by Roger McGuinn and Jacques Levy during 1969 for a planned country rock musical named Gene Tryp. The musical was never staged and the song was instead released in September 1970 as part of the Byrds' (Untitled) album. It was later issued as a single, peaking at number 121 on the Billboard singles chart and number 19 on the UK Singles Chart.