"Valleys of Neptune" is a song by American rock musician Jimi Hendrix, featured on his 2010 posthumous studio album Valleys of Neptune. Written and produced by Hendrix, the song was originally recorded between 1969 and 1970, and was released on March 8, 2010.
The song is featured as downloadable content in the video game, Rock Band, as a playable single. The song was released alongside his album Axis: Bold as Love on the week of March 30, 2010.
Hendrix began work on the musical composition for "Valleys of Neptune", under the title of "Gypsy Blood", in February 1969, with the first recordings taking place at Olympic Sound Studios in London on February 22 & 26, 1969 – three takes on guitar and piano and one take on guitar, respectively. Hendrix wrote the lyrics for the song under the title of "Valleys of Neptune... Arising" on June 7, 1969 while staying at the Beverly Rodeo Hotel in Beverly Hills, California. Bassist Noel Redding left The Jimi Hendrix Experience following a show on June 29, 1969 in Denver, Colorado, at which point Hendrix began to form a new band to continue work on his new compositions.