PULLMAN, Washington (Ticker) -- Oregon State gave Washington some room to pass, and the fifth-ranked Huskies rode the express lane all the way to Pasadena.
Marquis Tuiasosopo threw three touchdown passes in the first half as Washington coasted to a 51-3 victory over Washington State in the battle for the "Apple Cup."
Thanks to Oregon State's 23-13 victory over Oregon earlier in the day, Washington (10-1) finished in a three-way tie with the Ducks and Beavers atop the Pacific Coast Conference with identical 7-1 records. The Huskies won the three-way tiebreaker for the berth in the Rose Bowl and advance to Pasadena for the first time since the 1992 season.
"We're going to get to represent our conference in the Rose Bowl. It's a dream come true, and it makes me think about all the work that went into it," Washington coach Rick Neuheisel said.
Justin Robbins caught two TD passes for the Huskies, who will play Big 10 Conference champion Purdue, unless Washington is selected to play for the national title in the Orange Bowl.
Washington outgained the Cougars, 526-210, with a pair of rushers breaking the century mark. Rich Alexis carried 11 times for 122 yards and a score and Braxton Cleman carried 15 times for 105 yards and a touchdown.
"Our running backs did a good job of hitting the hole. Our defense was very opportunistic holding a very talented offensive team to three points," Neuheisel said. "We were on all cylinders."
Tuiasosopo delivered on Washington's first possession, completing a 19-yard TD pass to Wilbur Hooks. The Cougars moved into Washington territory on their next possession before Chris Massey intercepted a pass by Matt Kegel, who completed just 12-of-28 passes for 122 yards.
Tuiasosopo methodically moved the Huskies downfield, connecting on a 17-yard pass to Todd Elstrom to the Cougars 9-yard line and following with a nine-yard TD pass to Robbins.
Pat Conniff barreled over on a six-yard TD run early in the second quarter and Tuiasosopo made it 27-0 with a 34-yard TD pass to Robbins just before halftime.
Washington State (4-7, 2-6) generally has kept things close this season with seven of their games decided by a touchdown or less. But the Cougars were never competitive against their intrastate rivals, who won their seventh straight game.
"We got frustrated, we lost our composure," Washington State coach Mike Price said. "We didn't play with maturity at all, there's no question about it. Disappointed, frustrated."
The only score for Washington State was a 33-yard field goal by Anousith Wilaikul in the third quarter.
There was no letup in the third quarter as John Anderson scored on a 41-yard run and Alexis went in from one-yard out to make it 41-0. Cleman and Sean Sweat had short TD runs in the fourth quarter.
Washington posted its largest margin of victory against the Cougars and leads the series, 60-27-6.
Dave Minnich of Washington State carried 19 times for 113 yards.