Stoner doom pioneers Sleep, led by bassist Al Cisneros, invented the genre's blueprint with 1992's landmark "Sleep's Holy Mountain" and the epic one-song album "Dopesmoker." Now touring with new members Bubba Dupree (Void) and Dale Crover (Melvins) alongside fresh single "Have Spacesuit Will Travel," Sleep brings their riff-heavy, hallucinatory live show to The Observatory North Park in San Diego on September 8, 2026.