The Lost Trident Sessions is a studio album by jazz fusion group the Mahavishnu Orchestra, released on 21 September 1999 through Sony Music Entertainment.

According to the album's detailed liner notes, in November 1998 Columbia Records producer Bob Belden stumbled upon two quarter-inch tapes in Columbia's Los Angeles vault whilst gathering material for a remastered reissue of the Mahavishnu Orchestra's 1973 album Birds of Fire.

The tapes were otherwise unlabelled besides the recording location, but upon further inspection, they were revealed to be the two-track mixes for what would have been the Mahavishnu Orchestra's third studio album at the time.

The Mahavishnu Orchestra's 1973 live album, Between Nothingness and Eternity,[6] consisted entirely of songs from the Trident sessions: "Dream", "Trilogy" and "Sister Andrea."

Violinist Jerry Goodman and keyboardist Jan Hammer performed "I Wonder" and "Steppings Tones" on their 1974 album Like Children.