Editing Pac-12 Conference (section)

====Rivalry standings====

{| class="wikitable"
|-
! Rivalry name
! Standings
|-
| align="center"| Duel in the Desert
!style="{{NCAA color cell|Arizona Wildcats}}" |'''Arizona leads, 51–45–1'''
|-
| align="center"| The Big Game
!style="{{NCAA color cell|Stanford Cardinal}}" |'''Stanford leads, 65–50–11'''
|-
| align="center"| Rumble in the Rockies
!style="{{NCAA color cell|Utah Utes}}" |'''Utah leads, 35–32–3'''
|-
| align="center"| Civil War
!style="{{NCAA color cell|Oregon Ducks}}" |'''Oregon leads, 69–49–10'''
|-
| align="center"| UCLA–USC
!style="{{NCAA color cell|USC Trojans}}" |'''USC leads, 50–34–7'''
|-
| align="center"| Apple Cup
!style="{{NCAA color cell|Washington Huskies}}" |'''Washington leads, 76–34–6'''
|}

The most frequently played rivalries in the conference are between Oregon and Oregon State (126 meetings through 2022) and [[Big Game (American football)|Big Game]] between Stanford and California (125 meetings). These rivalries are among the [[List of most-played college football series in NCAA Division I|most-played rivalries in college football]].

The two newest members, Colorado and Utah, had [[Rumble in the Rockies|a football rivalry]] that had been dormant since 1962 – both were conference rivals previously in the [[Rocky Mountain Athletic Conference]] (now a [[NCAA Division II|Division II]] conference) and later the now-defunct [[Mountain States Conference]] (also known as the Skyline Conference). Even after Colorado joined what became the Big 12 in 1948 (the conference was then known popularly as the [[Big 7 Conference]]), the two schools continued their football rivalry for over a decade before ending it after the 1962 season. With the two schools being placed in the same division for football starting in 2011, the rivalry was revived with their 58th meeting during the 2011 season.

All of the California schools consider each other major rivals due to the culture clash between Northern and Southern California.<ref>[[Beano Cook]], [https://www.espn.com/classic/s/beano_stanusc.html Longstanding West Coast rivalry], [[ESPN Classic]].com, September 26, 2001, ''Accessed June 14, 2006''</ref> California and UCLA have a rivalry rooted in their shared history as the top programs within the [[University of California]] system. Stanford and USC have a rivalry rooted in their shared history as the only private schools in the Pac-12. California and USC also have a long history, playing each other beginning in 1915.

The [[Pacific Northwest]] schools of Oregon, Oregon State, Washington, and Washington State all consider each other major rivals due to their proximity and long history; a sweep of the other 3 teams is known as the [[Northwest Championship]]. The Oregon–Washington rivalry is sometimes referred to as the [[Oregon–Washington football rivalry|Border War]].<ref name=BorderWar>{{cite web|last=Linde|first=Rich|title=When did the Border War begin?|url=http://www.4malamute.com/zzzip.html|publisher=4malamute.com|access-date=September 18, 2011|archive-url=https://web.archive.org/web/20120323090827/http://www.4malamute.com/zzzip.html|archive-date=March 23, 2012|url-status=dead}}</ref>

Arizona and New Mexico have a recently renewed rivalry game, based upon when they were both members of the [[Western Athletic Conference|WAC]] and both states were longtime territories before being admitted as states in 1912. They played for the [[Kit Carson Rifle]] trophy, which was no longer used starting with their meeting in the 1997 Insight Bowl.<ref>Lobos Meet Arizona for First Time in 10 Years. University of New Mexico Athletic Department, September 10, 2007. The Rifle: The two schools used to play for the Kit Carson rifle, although that custom was dropped many years ago. Kit Carson was a legendary scout in the territories of New Mexico and Arizona in the 1800s. The story goes that nearly 70 years ago former New Mexico director of athletics Roy Johnson and Arizona AD Pop McKale obtained a rifle in a trade with an Indian rumored to be Geronimo. It's not known what the administrators provided in return. McKale donated the rifle in 1938 and the score of each game was etched into the stock. The Lobos won 10 times, Arizona 21.</ref><ref>[http://www.azstarnet.com/sn/related/201392 UA Sports UA Breakdown] {{Webarchive|url=https://web.archive.org/web/20081229180813/http://www.azstarnet.com/sn/related/201392 |date=December 29, 2008 }}. Arizona Daily Star, September 15, 2007. Arizona and New Mexico will meet tonight for the first time since the 1997 Insight Bowl. That year, before the game was played, the presidents of the two universities decided to discontinue the Kit Carson Rifle trophy out of respect for both schools' Native American communities.</ref>

USC and [[Notre Dame Fighting Irish football|Notre Dame]] have an intersectional rivalry (see [[Notre Dame–USC football rivalry]]). The games in odd-numbered years are played at [[Notre Dame Stadium]] in mid-October, while the games in even-numbered years are played at [[Los Angeles Memorial Coliseum]], usually in late November.

Stanford and Notre Dame also have an intersectional rivalry (See [[Notre Dame–Stanford football rivalry]]). The schedule of the Stanford–Notre Dame rivalry mirrors that of USC–Notre Dame. The games in even-numbered years are played at Notre Dame in mid-October, while the games in odd-numbered years are played at [[Stanford Stadium|Stanford]] in late November.

The isolated rural campuses of Washington State and Idaho are {{convert|8|mi|km|spell=in}} apart on the [[Palouse]], creating a natural border war known as the [[Battle of the Palouse]]. Idaho rejoined FBS in 1996 and was a member until 2017.

Utah and [[BYU Cougars football|BYU]] have a fierce rivalry nicknamed the [[Holy War (BYU–Utah)|Holy War]] that goes back to 1896.

Colorado also has a rivalry with in-state rival Colorado State called the [[Rocky Mountain Showdown]].

With the [[National Collegiate Athletic Association|NCAA]] permanently approving 12-game schedules in college football beginning in [[2006 NCAA Division I FBS football season|2006]], the Pac-10—alone among major conferences in doing so—went to a full nine-game conference schedule. Previously, the schools did not play one non-rival opponent, resulting in an eight-game conference schedule (four home games and four away). In 2010, the last season before the arrival of Colorado and Utah, the only other BCS conference that played a round-robin schedule was the Big East. The schedule consisted of one home and away game against the two schools in each region, plus the game against the primary in-state rival.