The Bengals (2-11, 1-3 Big Sky) used a 15-0 run near the end of the first half to take command. They hit 7 of 15 3-point baskets to open the second half and eventually took a 57-36 lead with 14 minutes remaining in the game.
Derrick Barden led Northern Colorado (3-9, 1-3) with 19 points. Tate Unruh added 14.
Idaho State won for the first time since Nov. 29, ending a six-game losing streak.
Tomas Sanchez and Sherrod Baldwin added 11 points each for the Bengals.
Northern Colorado tied the game at 19-19 after Unruh's basket with 8:17 left in the first half, but he was unable to convert the traditional three-point play. Idaho State then went on a 15-0 run with five players contributing points.
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