The Montana State Bobcats are the varsity athletic teams representing Montana State University in Bozeman in intercollegiate athletics. The university sponsors thirteen teams including men and women's basketball, cross country, skiing, tennis, and track and field; women's-only golf and volleyball; and men's-only football. The Bobcats compete in NCAA Division I and are members of the Big Sky Conference with the exception of the men's and women's skiing teams which belong to the Rocky Mountain Intercollegiate Ski Association. Their main rivals are the Grizzlies of the University of Montana in Missoula. Both schools are charter members of the Big Sky Conference, which began competition 63 years ago in the fall of 1963.