The Buffaloes remain unbeaten in four meetings with Northern Arizona (4-6), a member of the Big Sky conference which dropped to 0-3 against Pac-12 teams this season. The Lumberjacks were beaten by Oregon and Arizona earlier this season.
DeWayne Russell had 15 points and Max Jacobsen 10 to lead the Lumberjacks, whose 47-point loss represented their largest margin of defeat this season. The previous high was a 43-point loss to Arizona.
Colorado was breezing by the break, taking a 57-21 lead while piling up a season high in points for a half.
Forward Kennedy Meeks, who has averaged 9.4 points and 6.5 rebounds at North Carolina, has pulled out of the NBA draft and will return to the Tar Heels.
Cal big man Ivan Rabb could have been selected in the top 10 of the NBA draft. Instead, he's returning to Berkeley to make himself, and the Golden Bears, stronger.
Devin Williams' decision last month to sign with an agent and enter the NBA draft has left West Virginia in a tough spot.