Chuckie Keeton passed for two touchdowns, Kerwynn Williams rushed for 110 yards and senior Will Davis returned an interception 59 yards for a touchdown as No. 25 Utah State beat Idaho on Saturday to secure its first outright conference title in 76 years.
The Western Athletic Conference champion Aggies (10-2, 6-0) also earned their first 10-win season.
The Aggies intercepted Taylor Davis three times in the first half and forced him to fumble. Williams' 52-yard run set up Keeton's 3-yard TD pass to Kellen Bartlett early in the third quarter for a 28-9 advantage for the Aggies.
Williams added a 14-yard TD run in the fourth after opening the scoring with a 19-yard TD reception.
Lou Groza Award finalist Trey Farquhar kicked field goals of 38, 46 yards and 52 yards - his 11th career field goal of 50 yards or more for Idaho (1-11, 1-5).