Northern Colorado (16-8, 10-5 Big Sky) shot 61.7 percent from the field, including 11 of 18 from long range.
The Bears opened the game on a 15-2 run, including two 3-pointers from Unruh during the spurt. The Bears took a 38-28 lead to halftime, led by Unruh's 15 first-half points.
Northern Arizona (11-15, 8-7) trailed by double digits throughout the second half, as the Bears shot 68.4 percent in the half and hit 6 of 7 3s.
Barden was 8-of-8 shooting from the field in the game and Unruh hit 9 of 12 field goal attempts to lead Northern Colorado.
Tim Huskisson added 10 points for the Bears.
Kris Yanku was the lone Northern Arizona scorer in double figures, leading the Lumberjacks with 22 points.