Notre Dame 3 Portland 1
Notre Dame coach Randy Waldrum collected his 300th in 23 seasons as a college head coach as the Irish beat UP.
Amanda Cinalli scored a pair of early goals, and Katie Thorlakson had a goal and assists on both Cinalli goals to lead the Irish the final four for the seventh time.
Thorlakson set up Cinalli for goals in the third and 30th minutes before putting the game away with an that inswinger curled under the center of the crossbar. The goal gave Thorlakson her 22 for the season while pushing her season point total to 67, second all-time in Notre Dame history behind the 72 points posted by Cindy Daws during her 1996 Hermann Trophy season.
Thorlakson nearly scored moments later, rocketing a 25-yard shot that smacked off the crossbar. Candace Chapman then sent the rebound try off the crossbar as well.
Portland scored early in the second half on Christine Sinclair's 22nd goal of the season.
Santa Clara 2 Illinois 0
Senior Leslie Osborne scored her sixth game-winner of the season to lift 16th-seed Santa Clara (18-4-2) past Illinois and advance to its 10th final four.
In the 15th minute, Osborne beat Illini keeper Leisha Alcia to Micaela Esquivel's cross and headed it in for her ninth goal of the season. In the first minute of the second half, Bree Horvath put the game away with a side-volley on a rebound.
Santa Clara has now won 11 straight games. It meets Notre Dame in the semifinals. Earlier this season, the Irish handed the Broncos a 5-2 loss in South Bend.
UCLA 1 Ohio State 0
UCLA's Caitlin Ursini scored her first goal of the season off a free kick in the 64th minute to send the Bruins to their second straight appearance in the College Cup.
The loss snapped a program-best nine-game win streak for OSU, which ends the year with all-time marks in victories (19) and goals (62). The loss was Ohio State's first at home this season.
Princeton 3 Washington 1
Seventh-seeded Princeton booked a place in the College Cup with a 3-1 win over the 15th-seeded Huskies in front of a standing-room crowd of 2,804 at Lourie-Love Field.
Princeton got goals less than five minutes apart in the second half from Esmeralda Negron (her 20th of the season) and Kristina Fontanez to break open a 1-1 game.
Emily Behncke had scored her 14th goal on the season to give the Tigers the lead in the ninth minute. Two-time Pac-10 Player of the Year Tina Frimpong tied the score in the 32nd minute.
''There were all kinds of built-in excuses,'' UW coach Lesle Gallimore said, ''injuries, illnesses, travel. But we have no excuses. By the second half, Princeton was the dominant team.