The race for the Pac-12 championship gets going in Week 4 of the 2012 college football schedule. With five games on Saturday, the conference standings will start to take shape.

The Washington State Cougars get their conference slate underway when they face the Colorado Buffaloes on Saturday. WSU hasn't looked impressive, but they've found a way to win in their last two games over Eastern Washington and UNLV. The Cougars are still working out the kinks in new head coach Mike Leach's offense, and hope to get a chance to build some confidence against struggling Colorado.

The Buffaloes were hoping for a soft landing and a nice start in 2012 as they faced Colorado State, Sacramento State and Fresno State to begin the season. The first three games have been a nightmare for Colorado, as a winless streak culminated with a 69-14 loss at the hands of Fresno State last Saturday.

Elsewhere around the Pacific Northwest, the Oregon Ducks host the Arizona Wildcats in a battle of undefeated and ranked teams. The Oregon State Beavers look to build off their surprising win over the Wisconsin Badgers when they travel to Los Angeles and take on the 3-0 UCLA Bruins.

The Washington Huskies have a bye this week. They will take the field again when they host the Stanford Cardinal on Sept. 27.

Here is the complete Pac-12 schedule for Week 4 (all times Pacific):

Oregon St. at UCLA, 12:30 p.m. (ABC/ESPN2)

Colorado at Washington St., 1 p.m. (FX)

California at USC, 3 p.m. (PAC-12 NETWORKS)

Utah at Arizona St., 7 p.m. (PAC-12 NETWORKS)

Arizona at Oregon, 7:30 p.m. (ESPN)

For a complete college football schedule, visit S.I.'s College football schedule page.

For more on the Wildcats, check out WSU blog CougCenter.