1990 Big Sky Conference Men's Basketball Tournament

The 1990 Big Sky Conference Men's Basketball Tournament was the fifteenth edition, held March 8–10 at the BSU Pavilion at Boise State University in Boise, Idaho. Defending champion Idaho defeated Eastern Washington in the championship game, 65–62. It was the Vandals' second consecutive Big Sky tournament title, and fourth overall (1981, 1982, 1989, 1990).

1990 Big Sky Conference Men's Basketball Tournament

The 1990 Big Sky Conference Men's Basketball Tournament was the fifteenth edition, held March 8–10 at the BSU Pavilion at Boise State University in Boise, Idaho. Defending champion Idaho defeated Eastern Washington in the championship game, 65–62. It was the Vandals' second consecutive Big Sky tournament title, and fourth overall (1981, 1982, 1989, 1990).