Ørteren is located in Hardangervidda. Norwegian National Road 7 runs along the east side of the Lake. Ørteren is regulated for Ørteren Kraftverk. a hydroelectric power plant at Haugastøl. The power plant utilizes a drop of 160 meters between Ørteren and Sløtfjorden. It went into production in 1966. The dam and the intake were built by Oslo Energi and are currently operated by E- CO.