Fällfors Air Base had been a modernised Swedish Air Force base with three runways and a reinforced section of adjoining highway to act as a spare runway. The base was built in the 1950s. The base operated Saab 29 Tunnan, Saab 32 Lansen, Saab 35 Draken and Saab 37 Viggen fighter-bombers over the years. One of its features was a mountain hangar built in rock in the dispersal area to the north of the runways.[1] The base closed in 2006. The base was sold off and the Skellefteå Drive Center opened in 2008 and operated as a driver training and vehicle testing facility, with the former runways used occasionally for drag racing. After an ownership change in 2017 the anticipated motor racing circuit was completed and the held their first race on 14 June 2019.[2] The circuit is 4.270 km (2.653 mi) long, the longest circuit in Sweden, approximately 245 m (804 ft) longer than Anderstorp Raceway.