The J. Lawrence Walkup Skydome is an indoor multi-purpose stadium located on the campus of Northern Arizona University (NAU) in Flagstaff, Arizona. Opened 40 years ago in September 1977, it is the home of the NAU Lumberjacks football and basketball teams of the Big Sky Conference. The seating capacity is 11,230, with 10,000 permanent seats and 1,230 seats in portable bleachers. During its first football season it hosted five games, with an average attendance of 13,029. NAU football was previously played outdoors on natural grass at Lumberjack Stadium. The dome hosted the Big Sky men's basketball tournament in 1987, 1997, 1998, and 2006.