Earth Opera was an American psychedelic rock group, active during 1967-1969.
Co-founded by Boston, Massachusetts virtuoso folk and bluegrass performers, Peter Rowan and David Grisman.
The duo were joined by John Nagy on bass, Paul Dillon (4) on drums, and Bill Stevenson (3) on keyboards and vibraphone.
Bill left in 1968 and, after releasing their second album, the band disbanded in 1969.