Grand Opening and Closing is the debut album by the American avant-garde metal group Sleepytime Gorilla Museum.

The album was produced by Dan Rathbun and Sleepytime Gorilla Museum.

When the band signed to The End Records in 2006, the album was re-released on September 5, 2006, with three previously unreleased tracks.

[2] Grand Opening and Closing features David Shamrock on drums, the only SGM album to do so.

For example, the track "Sleep is Wrong" quotes a section of a poem by Dylan Thomas,[3] while "Sleepytime (Spirit is a Bone)" is inspired by William T. Vollmann's The Rainbow Stories and phrenology.