The 2000 Big Sky Conference men's basketball tournament was held March 8–11 at Dahlberg Arena at the University of Montana in Missoula, Montana.
[2] Northern Arizona defeated Cal State Northridge in the championship game, 85–81, to win their second Big Sky men's basketball tournament title.
The Lumberjacks, in turn, received an automatic bid to the 2000 NCAA tournament.
No new teams were added to the Big Sky prior to the 1999–2000 season, leaving total membership at nine.
Only the top six teams from the regular season conference standings were invited to the tournament.