"Bad Fog of Loneliness" is a song written by Canadian singer-songwriter Neil Young, recorded in 1971 but not released until 2007 on the album Live at Massey Hall 1971, in 2009 on The Archives Vol. 1 1963–1972 as a studio outtake, and in 2013 on Live at the Cellar Door. It also appeared on Young's live "Red Rocks" DVD released in 2000.