Crack the Skye is the fourth studio album by American heavy metal band Mastodon, released on March 24, 2009 through Reprise, Sire and Relapse Records. The album debuted at number 11 on the Billboard 200, selling 41,000 copies in its first week. In Australia, the album debuted at number 19. It had sold 200,000 copies in the US as of September 2010, making it one of their highest-selling albums to date.
