Northern Arizona (15-16, 12-8 Big Sky) used a 7-0 run at the end of the first half to take a 26-21 lead at the break. Montana (17-12, 12-8) made just 5 of 19 shots before intermission.
The Lumberjacks ran away in the second half, outscoring the Grizzlies 41-26 as Montana made just one basket after the 12:31 mark, a layup by Nick Emerson with 36 seconds left in the game. For the game, Montana shot 29 percent (11 of 38) and just 4 of 17 beyond the arc.
Ako Kaluna had 12 points while Aaseem Dixon added 11 for Northern Arizona, which shot 50 percent and enjoyed a 40-21 rebounding advantage.
Kareem Jamar led Montana with 15 points, including 7 of 10 from the line. He was the only Grizzly in double figures.