Dominique Hatfield returned a fourth-quarter interception 20 yards for a touchdown and No. 25
Travis Wilson threw for
Sefo Liufau completed 20 of 31 passes for 317 yards and a touchdown, but the game turned on his late interception. Colorado (2-10, 0-9) finished winless in league play for the first time since 1915 when the Buffaloes finished 0-5 in the Rocky Mountain Conference.
Trailing by eight, Utah pulled to 24-22 early in the third quarter on Booker's one-yard touchdown run, capping a sequence in which replay review led to three reversals, including the scoring play.
Oregon (11-1, 8-1) will face Arizona in the Pac-12 championship game Friday at Levi's Stadium in Santa Clara,
Freshman Royce Freeman ran for 135 yards and also caught one of Mariota's touchdown passes. Fellow freshman Charles Nelson caught two passes — both touchdowns — for 56 yards, and Byron Marshall had six catches for 131 yards and a score.
It was Oregon's seventh straight win overall and seventh in the series against the rival Beavers (5-7, 2-7), who lost six of their last seven games and failed to become bowl-eligible.
Brigham Young 42, at California 35: Christian Stewart threw for 433 yards and five touchdowns, and the
Stewart tossed a 38-yard touchdown pass to a wide-open Jordan Leslie with 2:39 remaining for the go-ahead score, setting off chants of "B-Y-U! B-Y-U!" at half-filled Memorial Stadium. The Cougars (8-4) stopped record-setting Cal quarterback Jared Goff one more time to finish the season with four straight victories. Goff threw for 393 yards and four touchdowns, adding to his own school record for yards passing in a season and breaking Pat Barnes' mark of 31 touchdown passes in 1996. But he threw incomplete on four straight passes to the end zone as the Bears (5-7) ended the season with three losses in a row.