The 2012 Big Sky Conference Men's Basketball Tournament began on March 3 and continued through March 7. The regular-season champion Montana Grizzlies won the tournament and with it an automatic bid to the NCAA Tournament. Unlike many NCAA Division I conferences, the Big Sky does not invite all of its teams to its postseason tournament—only the top six teams in regular-season play qualify. The top two teams receive a bye into the semifinals, and the field is reseeded after the first round so that the 1 seed plays the lowest remaining seed.