Apogaea (meaning "far from Earth") is an annual collaborative outdoor arts and music festival held as a Colorado regional counterpart for the Burning Man event. Typically held in late spring (scheduled for June 7–10 in 2018) in southern Colorado, Apogaea ("Apo"), establishes a temporary autonomous zone where radical self-expression, inclusiveness, and self-reliance are the hallmarks of its participants.

More info: https://apogaea.com/