This could be one of the truly great season finales in Pac-12 history. And this comes from a league that consistently plays its best rivalries on the final weekend of the year. The Civil War. The Apple Cup. The Duel in the Desert. Notre Dame and USC. And, oh by the way, Stanford visits UCLA with a trip to the Pac-12 championship game on the line.

Additionally, it's worth nothing that Colorado will play Utah.

Pac-12's Top Storylines to Watch in Week 13:

So much for a Oregon-USC rematch in the Pac-12 title game. UCLA not only knocked Matt Barkley out of the game, the Bruins knocked the Trojans out of the title race for good. UCLA has clinched its second straight bid to the conference championship game — and they may have to face the same team in six days. Should Stanford win in the Rose Bowl this weekend, these two teams will meet again in Palo Alto for the right to play in the Rose Bowl against the Big Ten champ.

The Oregon-USC rematch Pac-12 championship game has felt like a foregone conclusion for much of the 2012 calendar year. However, it's very possible both teams could lose this weekend — and that would essentially put Stanford and UCLA into the championship game. What a twist that would be in Week 12, right? Those are two of the best games of the year in the Pac-12 and are two of the marquee showdowns nationally this weekend. Sit back and enjoy.

Pac-12's Top Storylines to Watch in Week 12:

What a last few weeks it should be out West. UCLA and USC will square off this weekend with a trip to the Pac-12 championship game on the line. Oregon now has to face possibly its toughest two opponents of the season with Stanford and Oregon State to finish the year. Jeff Tedford is hanging by a thread in Berkeley. And all chaos is breaking out in Pullman.

The race in the Pac-12 South continues to entertain. Arizona's loss to UCLA was costly, both in the standings and on the injury report. USC's loss to Oregon didn't end their title hopes as the two L.A. schools are now headed on a collision course for Nov. 17. But both need to take care of business this weekend against overmatched opponents to ensure next weekend's game sends the winner to Eugene in December. Otherwise, all eyes should be pointed northward to Palo Alto, where the Beavers come to town, and Seattle, where Utah is fighting for a bowl game.

The Oregon Ducks cleared their first big hurdle with style and grace. Defensively, USC was able to move the football plenty, but simply couldn't stop what could be the best offense in the nation. However, due to a monster performance across town from UCLA over Arizona, USC sits back in the driver's seat for the Pac-12 South Division championship. And a trip to Eugene could be just as entertaining as this weekend's offensive showcase in Los Angeles.

It's here! November 3 has been a day circled by many West coast football fans since the season ended last January. And had Arizona not gone and screwed everything up, this Oregon-USC showdown would still carry national title implications for both teams. Instead, there's a national title hanging in the balance for just one team. The Oregon Ducks. All eyes will be focused on The Coliseum, but Pac-12 fans have a full holiday menu this Saturday. There will be plenty of tricks and treats for some (Utah? Washington? Oregon State?) and freakish ghouls for others (Cal? Arizona State?

The Pac-12 South was expected to be a one-team race in the preseason. USC was a heavy favorite in August but already has two losses in Pac-12 play. The Trojans, UCLA and Arizona State all have two losses within the conference and Arizona isn't far behind with a 2-3 record. 

Arizona, Arizona State, UCLA or USC: Which Team Wins the Pac-12 South?

And then there was one. Most didn't believe Oregon State or USC could make it to the BCS National Championship game, however, they both just kept winning. No more. After tough road losses this weekend, the Oregon Ducks are flying above the rest of the Pac-12 as the lone remaining national title contender. The depth of the league was once again on full display as programs like Arizona, UCLA and Washington prove that the middle of this league is as strong as any league in the nation.

Two unbeatens still remain out West and one will face a major road test this weekend. But a former Pac-12 Player of the Year candidate will return to help the Beavers attempt to stay unblemished against Washington. The Ducks-Buffaloes showdown, however, shouldn't be nearly as competitive.