Portland and Portland State lost conference road games.
The Pilots fell 67-43 at BYU in Provo, Utah.
The Vikings suffered an 84-61 defeat at Northern Arizona.
Cougars race past UP in second half
Portland led BYU 26-23 at the half, but the host Cougars built a 20-point lead in the first 13 minutes of the second half and coasted to the West Coast Conference victory.
Jasmine Wooton led UP with 11 points. Amy Pupa had 10 rebounds and eight points. She ranks third all-time for UP at the Division I level with 689 rebounds. A senior, Pupa has a chance to catch the school's career D-I leader, Khalila O'Rielly-Williams, who had 755 rebounds.
The Pilots fell to 14-11 overall and 7-7 in the WCC. UP is sixth in the 10-team league, not far behind fifth-place San Diego (8-6) and Saint Mary's and Pacific, who are tied for third at 8-5. Loyola Marymont is seventh at 5-8.
BYU is 20-5, 10-4. The Cougars are second in the league, trailing No. 15 Gonzaga (13-1 WCC, 23-3 overall).
Portland plays at San Diego at 2 p.m. Saturday in a key match-up in the battle for positioning in the WCC.
PSU can't keep pace
Northern Arizona shot 52.7 percent from the field to beat Portland State 84-61 at Flagstaff, Ariz.
The Vikings fired at a 38.0-percent clip.
For PSU, freshman point guard Delanie Parry scored a career-high 14 points, going 6 of 10 from the field. She also led the Viks with three assists and five steals.
Kate Lanz had 11 points in the second half for the visitors.
NAU's Amanda Frost, who leads the Big Sky in scorer, poured in 28 points, 18 in the first half.
The Vikings dropped to 4-9 in the conference and 6-16 overall, while the Lumberjacks climbed to 4-9, 7-15.
Portland State's road trip concludes with a 1 p.m. Saturday game at Sacramento State (7-6, 15-7).