The 1999 Big West Conference men's basketball tournament was held March 4–6 at Lawlor Events Center in Reno, Nevada.
[2] New Mexico State defeated Boise State in the championship game, 79–69, to obtain the third Big West Conference Men's Basketball Tournament championship in school history.
The Aggies participated in the 1999 NCAA Division I men's basketball tournament after earning the conference's automatic bid.
Eight of the 12 teams in the conference participated, with Cal Poly, Nevada, North Texas, and UC Irvine not qualifying.
The top eight teams were seeded based on regular season conference records.