Arielle Roberson had 17 points and 13 rebounds Friday night to lead No. 20 Colorado to a 59-45 victory over Washington State.
Chucky Jeffery had 10 points, seven rebounds and six assists while Jen Reese scored 10 points and grabbed seven rebounds for the Buffaloes (21-5, 10-5 Pac-12), who have won six in a row.
Lia Galdeira led Washington State with 12 points, but made just 2 of 13 shots from the field. The Cougars (10-16, 6-9) shot 19 percent.
Colorado shot 34 percent and benefited from a 34-14 advantage on points in the paint.
The Buffs are in fifth place in the Pac-12, one game behind UCLA and Washington who are tied for third. Colorado hosts Washington on Sunday.