The 2013 Pac-12 Conference football season began on August 29, 2013 with USC at Hawaii. The conference's first game was played on September 7, 2013 with Washington State winning over USC, and the final game was the Pac-12 Championship Game on December 7, 2013. This is the third season for the conference as a 12-team league. The Sagarin Ratings had the Pac-12 as the best conference in the nation top to bottom in the final rating of the season.