The Sanford Pentagon (colloquially known as The Pentagon) is an indoor arena located in Sioux Falls, South Dakota. The Pentagon opened in September 2013 and has a seating capacity of 3,250 spectators. It hosts the Sioux Falls Skyforce of the NBA G League. The facility is known for hosting a wide range of sporting events including: regional youth basketball tournaments, NCAA Division I basketball games, NCAA Division II basketball games and tournaments, mixed martial arts events, and occasional concerts.