# Border War (Colorado State–Wyoming rivalry)

The Border War is the name of a college rivalry between the athletic teams of the Colorado State University Rams and the University of Wyoming Cowboys/Cowgirls.

## Background

Colorado State University is a public university in Fort Collins, Colorado, and the University of Wyoming is a public university in Laramie, Wyoming. The two campuses are around 65 miles apart via U.S. Route 287. Both teams have been inaugural members of the Mountain West Conference since 1999, and were previously both members of the Western Athletic Conference from 1968 to 1999.

## Football

The football rivalry between the two schools dates back to Thanksgiving Day, November 30, 1899. In the first ever matchup between the two schools and the first game that Colorado Agricultural (now known as Colorado State) ever played outside of Colorado, a disagreement between officials from the two schools resulted in a controversial ending to the game.
At the time, officials were provided by the schools competing in the game. The game concluded with a Wyoming forfeit being called after Colorado Agricultural official Edward House ruled that Wyoming official E.D. McArthur and the Wyoming team were refusing to abide by the rulebook. After the forfeit was called and the Colorado Agricultural players began leaving the field, official McArthur reportedly exclaimed that he "did not give a damn for the rules" and instructed the Wyoming team to run in a touchdown. This action reportedly set off a brawl between the teams. Following the game, Colorado Agricultural President Barton Aylesworth declared that his school would not play Wyoming in any athletic event until he received a written apology from Wyoming. The two schools played again the following year, and there has remained bad blood between the two programs since. The series is also the oldest and most-played in the Mountain West, and one of the most-played in the nation.

### Bronze Boot

As the main component of the Border War rivalry, the football rivalry series revolves around the Bronze Boot - a traveling trophy awarded to the winner of the CSU-Wyoming football game each year.
In 1968, the ROTC detachments of the respective schools initiated the Bronze Boot. The boot was worn in the Vietnam War by Cpt. Dan J. Romero, an Adams State College graduate and Army ROTC instructor at CSU between 1967 and 1969. Each year leading up to the Colorado State–Wyoming game, the game ball is carried in a running shuttle relay by the ROTC detachment of the visiting team along US 287 to the Colorado–Wyoming border, where the home team's ROTC detachment receives it and runs the game ball to the stadium hosting the game. The trophy is guarded by the ROTC unit of the past year's winning school during the game.

### Game results

| Colorado State victories | Wyoming victories | Tie games |
| No. | Date | Location | Winning team | Winning team | Losing team | Losing team |
| 1 | November 30, 1899† | Laramie | Colorado Agricultural | 12 | Wyoming | 0 |
| 2 | November 24, 1900 | Fort Collins | Colorado Agricultural | 16 | Wyoming | 0 |
| 3 | November 14, 1903 | Fort Collins | Colorado Agricultural | 17 | Wyoming | 0 |
| 4 | November 24, 1904 | Laramie | Tie | 6 | Tie | 6 |
| 5 | November 25, 1905 | Fort Collins | Colorado Agricultural | 34 | Wyoming | 5 |
| 6 | November 14, 1908 | Laramie | Colorado Agricultural | 20 | Wyoming | 0 |
| 7 | October 16, 1909 | Fort Collins | Colorado Agricultural | 32 | Wyoming | 3 |
| 8 | November 24, 1910 | Laramie | Wyoming | 10 | Colorado Agricultural | 0 |
| 9 | November 30, 1911 | Fort Collins | Wyoming | 27 | Colorado Agricultural | 0 |
| 10 | November 28, 1912 | Laramie | Colorado Agricultural | 33 | Wyoming | 0 |
| 11 | November 27, 1913 | Fort Collins | Colorado Agricultural | 61 | Wyoming | 0 |
| 12 | October 24, 1914 | Laramie | Colorado Agricultural | 48 | Wyoming | 10 |
| 13 | November 6, 1915 | Laramie | Colorado Agricultural | 48 | Wyoming | 0 |
| 14 | September 30, 1916 | Fort Collins | Colorado Agricultural | 40 | Wyoming | 0 |
| 15 | October 6, 1917 | Laramie | Wyoming | 6 | Colorado Agricultural | 0 |
| 16 | September 27, 1919 | Laramie | Colorado Agricultural | 28 | Wyoming | 0 |
| 17 | October 4, 1919 | Fort Collins | Colorado Agricultural | 14 | Wyoming | 0 |
| 18 | October 2, 1920 | Laramie | Colorado Agricultural | 13 | Wyoming | 0 |
| 19 | October 16, 1920 | Fort Collins | Colorado Agricultural | 42 | Wyoming | 0 |
| 20 | October 1, 1921 | Fort Collins | Tie | 7 | Tie | 7 |
| 21 | October 14, 1922 | Laramie | Colorado Agricultural | 60 | Wyoming | 0 |
| 22 | September 29, 1923 | Fort Collins | Colorado Agricultural | 33 | Wyoming | 0 |
| 23 | November 26, 1925 | Fort Collins | Colorado Agricultural | 40 | Wyoming | 0 |
| 24 | October 4, 1929 | Laramie | Colorado Agricultural | 20 | Wyoming | 7 |
| 25 | November 8, 1930 | Fort Collins | Wyoming | 21 | Colorado Agricultural | 6 |
| 26 | November 7, 1931 | Laramie | Colorado Agricultural | 26 | Wyoming | 6 |
| 27 | November 24, 1932 | Fort Collins | Colorado Agricultural | 23 | Wyoming | 0 |
| 28 | September 30, 1933 | Laramie | Colorado Agricultural | 7 | Wyoming | 0 |
| 29 | November 3, 1934 | Fort Collins | Colorado Agricultural | 16 | Wyoming | 0 |
| 30 | September 28, 1935 | Laramie | Colorado A&M | 12 | Wyoming | 3 |
| 31 | October 17, 1936 | Laramie | Tie | 0 | Tie | 0 |
| 32 | October 16, 1937 | Fort Collins | Wyoming | 7 | Colorado A&M | 0 |
| 33 | October 1, 1938 | Fort Collins | Tie | 0 | Tie | 0 |
| 34 | November 4, 1939 | Fort Collins | Colorado A&M | 22 | Wyoming | 0 |
| 35 | October 5, 1940 | Laramie | Tie | 0 | Tie | 0 |
| 36 | October 4, 1941 | Fort Collins | Colorado A&M | 27 | Wyoming | 0 |
| 37 | September 26, 1942 | Fort Collins | Colorado A&M | 10 | Wyoming | 0 |
| 38 | October 5, 1946 | Laramie | Colorado A&M | 7 | Wyoming | 0 |
| 39 | November 22, 1947 | Fort Collins | Colorado A&M | 21 | Wyoming | 6 |
| 40 | October 16, 1948 | Laramie | Colorado A&M | 21 | Wyoming | 20 |
| 41 | October 1, 1949 | Fort Collins | Wyoming | 8 | Colorado A&M | 0 |
| 42 | October 7, 1950 | Laramie | Wyoming | 34 | Colorado A&M | 0 |
| 43 | October 13, 1951 | Fort Collins | Colorado A&M | 14 | Wyoming | 7 |
| 44 | October 11, 1952 | Laramie | Colorado A&M | 14 | Wyoming | 0 |
| 45 | October 10, 1953 | Laramie | Wyoming | 21 | Colorado A&M | 14 |
| 46 | October 9, 1954 | Fort Collins | Wyoming | 34 | Colorado A&M | 0 |
| 47 | October 8, 1955 | Laramie | Colorado A&M | 14 | Wyoming | 13 |
| 48 | October 6, 1956 | Fort Collins | Wyoming | 20 | Colorado A&M | 12 |
| 49 | October 12, 1957 | Laramie | Wyoming | 27 | Colorado State | 13 |
| 50 | October 18, 1958 | Fort Collins | Wyoming | 7 | Colorado State | 6 |
| 51 | October 10, 1959 | Laramie | Wyoming | 29 | Colorado State | 0 |
| 52 | October 15, 1960 | Fort Collins | Wyoming | 40 | Colorado State | 8 |
| 53 | October 14, 1961 | Laramie | Wyoming | 18 | Colorado State | 7 |
| 54 | October 27, 1962 | Fort Collins | Wyoming | 28 | Colorado State | 7 |
| 55 | October 12, 1963 | Laramie | Wyoming | 21 | Colorado State | 3 |
| 56 | September 19, 1964 | Laramie | Wyoming | 31 | Colorado State | 7 |
| 57 | September 25, 1965 | Fort Collins | Wyoming | 33 | Colorado State | 14 |
| 58 | October 29, 1966 | Fort Collins | Colorado State | 12 | #10 Wyoming | 10 |
| 59 | September 30, 1967 | Laramie | Wyoming | 13 | Colorado State | 10 |
| No. | Date | Location | Winning team | Winning team | Losing team | Losing team |
| 60 | November 2, 1968 | Fort Collins | Wyoming | 46 | Colorado State | 14 |
| 61 | October 4, 1969 | Laramie | #19 Wyoming | 39 | Colorado State | 3 |
| 62 | October 10, 1970 | Fort Collins | Wyoming | 16 | Colorado State | 6 |
| 63 | October 2, 1971 | Laramie | Wyoming | 17 | Colorado State | 6 |
| 64 | October 14, 1972 | Fort Collins | Wyoming | 28 | Colorado State | 9 |
| 65 | October 20, 1973 | Laramie | Wyoming | 35 | Colorado State | 3 |
| 66 | November 2, 1974 | Fort Collins | Colorado State | 11 | Wyoming | 6 |
| 67 | October 4, 1975 | Laramie | Colorado State | 3 | Wyoming | 0 |
| 68 | October 30, 1976 | Fort Collins | Colorado State | 19 | Wyoming | 16 |
| 69 | October 29, 1977 | Laramie | Wyoming | 29 | Colorado State | 13 |
| 70 | October 28, 1978 | Fort Collins | Wyoming | 13 | Colorado State | 3 |
| 71 | September 29, 1979 | Laramie | Colorado State | 20 | Wyoming | 16 |
| 72 | November 1, 1980 | Fort Collins | Colorado State | 28 | Wyoming | 25 |
| 73 | October 31, 1981 | Laramie | Wyoming | 55 | Colorado State | 21 |
| 74 | September 11, 1982 | Fort Collins | Colorado State | 9 | Wyoming | 3 |
| 75 | November 19, 1983 | Laramie | Wyoming | 42 | Colorado State | 17 |
| 76 | October 27, 1984 | Fort Collins | Wyoming | 43 | Colorado State | 34 |
| 77 | October 26, 1985 | Laramie | Colorado State | 30 | Wyoming | 19 |
| 78 | October 25, 1986 | Fort Collins | Colorado State | 20 | Wyoming | 15 |
| 79 | October 31, 1987 | Laramie | Wyoming | 20 | Colorado State | 15 |
| 80 | October 29, 1988 | Fort Collins | #10 Wyoming | 48 | Colorado State | 14 |
| 81 | November 4, 1989 | Laramie | Wyoming | 56 | Colorado State | 35 |
| 82 | November 3, 1990 | Fort Collins | Colorado State | 17 | #19 Wyoming | 8 |
| 83 | October 26, 1991 | Laramie | Wyoming | 35 | Colorado State | 28 |
| 84 | October 24, 1992 | Fort Collins | Wyoming | 31 | Colorado State | 14 |
| 85 | November 20, 1993 | Laramie | Colorado State | 41 | Wyoming | 21 |
| 86 | November 5, 1994 | Fort Collins | #14 Colorado State | 35 | Wyoming | 24 |
| 87 | October 28, 1995 | Laramie | Colorado State | 31 | Wyoming | 24 |
| 88 | November 16, 1996 | Fort Collins | #23 Wyoming | 25 | Colorado State | 24 |
| 89 | October 18, 1997 | Laramie | Colorado State | 14 | Wyoming | 7 |
| 90 | November 7, 1998 | Fort Collins | Wyoming | 27 | Colorado State | 19 |
| 91 | October 23, 1999 | Laramie | Colorado State | 24 | Wyoming | 13 |
| 92 | November 16, 2000 | Fort Collins | Colorado State | 37 | Wyoming | 13 |
| 93 | September 29, 2001 | Laramie | Colorado State | 42 | Wyoming | 14 |
| 94 | October 12, 2002 | Fort Collins | Colorado State | 44 | Wyoming | 36 |
| 95 | November 1, 2003 | Laramie | Wyoming | 35 | Colorado State | 28 |
| 96 | October 22, 2004 | Fort Collins | Colorado State | 30 | Wyoming | 7 |
| 97 | October 22, 2005 | Fort Collins | Colorado State | 39 | Wyoming | 31 |
| 98 | October 21, 2006 | Laramie | Wyoming | 24 | Colorado State | 0 |
| 99 | November 23, 2007 | Fort Collins | Colorado State | 36 | Wyoming | 28 |
| 100 | November 22, 2008 | Laramie | Colorado State | 31 | Wyoming | 20 |
| 101 | November 27, 2009 | Fort Collins | Wyoming | 17 | Colorado State | 16 |
| 102 | November 20, 2010 | Laramie | Wyoming | 44 | Colorado State | 0 |
| 103 | December 3, 2011 | Fort Collins | Wyoming | 22 | Colorado State | 19 |
| 104 | November 3, 2012 | Laramie | Wyoming | 45 | Colorado State | 31 |
| 105 | October 19, 2013 | Laramie | Colorado State | 52 | Wyoming | 22 |
| 106 | October 25, 2014 | Fort Collins | Colorado State | 45 | Wyoming | 31 |
| 107 | November 7, 2015 | Laramie | Colorado State | 26 | Wyoming | 7 |
| 108 | October 1, 2016 | Fort Collins | Wyoming | 38 | Colorado State | 17 |
| 109 | November 4, 2017 | Laramie | Wyoming | 16 | Colorado State | 13 |
| 110 | October 26, 2018 | Fort Collins | Wyoming | 34 | Colorado State | 21 |
| 111 | November 22, 2019 | Laramie | Wyoming | 17 | Colorado State | 7 |
| 112 | November 5, 2020 | Fort Collins | Colorado State | 34 | Wyoming | 24 |
| 113 | November 6, 2021 | Laramie | Wyoming | 31 | Colorado State | 17 |
| 114 | November 12, 2022 | Fort Collins | Wyoming | 14 | Colorado State | 13 |
| 115 | November 3, 2023 | Laramie | Wyoming | 24 | Colorado State | 15 |
| 116 | November 15, 2024 | Fort Collins | Colorado State | 24 | Wyoming | 10 |
| Series: Colorado State leads 60–51–5 |||||||
† = This game is controversial, but was ruled as a Wyoming forfeit per rule.

## Men's basketball

The "Border War" between Colorado State and Wyoming also extends to men's basketball. The ESPN College Basketball Encyclopedia considers Colorado State to be Wyoming's "fiercest rival". Wyoming leads the series 138–105 over Colorado State as of 2025.

### Notable men's basketball games

* January 27, 1951: Colorado State beat AP No. 20 Wyoming 62–38.
* February 14, 1987: Wyoming won 81–78 in triple overtime. Wyoming's Reggie Fox made a tying three pointer to force the second overtime, and Turk Boyd also hit a three to force the third overtime. The ESPN College Basketball Encyclopedia considers this the greatest Border War game of all time.
* January 23, 1988: Colorado State upset AP No. 17 Wyoming 54–49.
* March 11, 1988: No. 14 Wyoming beat Colorado State 60–58 in the WAC men's basketball tournament semifinal and would eventually become tournament champions. With two seconds left and the game tied at 58, Eric Leckner caught a three-quarter-court-length inbounds pass at the top of the key, turned, and made a 19-foot buzzer-beating jumper falling down, to win the game for Wyoming.
* March 9, 2000: In both schools' first seasons in the Mountain West Conference, Wyoming beat Colorado State 74–68 in quarterfinal round of the inaugural MWC basketball tournament, held at the Thomas & Mack Center in Las Vegas.
* March 13, 2003: In the quarterfinal round of the MWC tournament, No. 6 seed Colorado State beat No. 3 Wyoming 74–71. Colorado State would go on to win the tournament and a berth in the NCAA tournament.
* March 6, 2013: Colorado State won at Laramie, 78–56. However, this game became controversial because Wyoming students chanted "alcoholic" at Colorado State coach Larry Eustachy, a recovering alcoholic. At the game, fliers created by interns at the Wyoming athletics marketing office were distributed and made light of an infamous 2003 photo showing Eustachy, then the head coach at Iowa State, partying with University of Missouri students after the Missouri Tigers beat Iowa State. Wyoming's athletic director apologized for the students' behavior.
* January 31, 2018: 14–7 (5–3 conf) Wyoming beat 10–13 (3–7 conf) Colorado State 91–86 in double overtime in Fort Collins. The Rams had two players record double-doubles — Deion James, who recorded 24 points and 14 rebounds and Nico Carvacho, who recorded 10 points and 13 rebounds. Hayden Dalton led Wyoming with 26 points.
* February 23, 2019: Colorado State won in Fort Collins, beating Wyoming 83–48. The 35 point differential became the largest margin of victory in the history of the Border War series.
* January 31, 2022: 16–2 (6–2 conf) Colorado State traveled north to Laramie to take on 16–3 (5–1 conf) Wyoming on January 31, 2022. Regulation ended with the Rams and Cowboys tied at 70, and the Cowboys outscored the Rams 14–8 in overtime to hand the Rams their first back-to-back loss of the season. David Roddy led the Rams in scoring with 23 points before fouling out in overtime. Roddy made 9 of 15 shots — including 4 of 5 three-pointers — but struggled at the free-throw line, missing 2 of 3 shots including one that would've won the game at the end of regulation. Hunter Maldonado led scoring for the Cowboys by recording a new career-high 35 points, which marked the second consecutive game where the Rams allowed an opposing player to set a new career-high. Graham Ike recorded 16 points and 8 rebounds for the Cowboys before fouling out in overtime along with Roddy.

### Game results

Rankings are from the AP Poll. Source for results:
| Colorado State victories | Wyoming victories |
| No. | Date | Location | Winner | Score |
| 1 | January 27, 1911 | Laramie | Colorado Agricultural | 20–17 |
| 2 | February 18, 1911 | Fort Collins | Colorado Agricultural | 30–12 |
| 3 | January 26, 1912 | Laramie | Colorado Agricultural | 16–14 |
| 4 | February 21, 1912 | Fort Collins | Colorado Agricultural | 16–13 |
| 5 | January 18, 1913 | Laramie | Colorado Agricultural | 23–21 |
| 6 | February 19, 1913 | Fort Collins | Colorado Agricultural | 30–18 |
| 7 | January 25, 1914 | Laramie | Colorado Agricultural | 34–10 |
| 8 | January 31, 1914 | Fort Collins | Colorado Agricultural | 43–16 |
| 9 | January 16, 1915 | Laramie | Colorado Agricultural | 21–19 |
| 10 | February 13, 1915 | Fort Collins | Colorado Agricultural | 26–16 |
| 11 | January 17, 1916 | Laramie | Colorado Agricultural | 34–24 |
| 12 | February 20, 1916 | Fort Collins | Wyoming | 34–26 |
| 13 | March 2, 1916 | Fort Collins | Colorado Agricultural | 44–22 |
| 14 | January 19, 1917 | Laramie | Colorado Agricultural | 18–12 |
| 15 | January 20, 1917 | Laramie | Colorado Agricultural | 34–5 |
| 16 | February 11, 1917 | Fort Collins | Colorado Agricultural | 42–23 |
| 17 | January 19, 1918 | Fort Collins | Colorado Agricultural | 26–17 |
| 18 | January 24, 1919 | Laramie | Wyoming | 32–8 |
| 19 | January 25, 1919 | Laramie | Wyoming | 23–17 |
| 20 | January 17, 1920 | Fort Collins | Wyoming | 30–20 |
| 21 | February 6, 1920 | Laramie | Wyoming | 16–9 |
| 22 | February 11, 1921 | Fort Collins | Colorado Agricultural | 16–12 |
| 23 | February 12, 1921 | Fort Collins | Wyoming | 20–18 |
| 24 | February 10, 1922 | Laramie | Wyoming | 18–16$^{OT}$ |
| 25 | February 11, 1922 | Laramie | Colorado Agricultural | 19–8 |
| 26 | February 8, 1924 | Fort Collins | Colorado Agricultural | 29–16 |
| 27 | February 9, 1924 | Fort Collins | Colorado Agricultural | 28–21 |
| 28 | February 27, 1925 | Laramie | Wyoming | 32–15 |
| 29 | February 28, 1925 | Laramie | Wyoming | 43–10 |
| 30 | February 9, 1926 | Laramie | Wyoming | 34–14 |
| 31 | February 27, 1926 | Fort Collins | Wyoming | 36–23 |
| 32 | February 5, 1927 | Fort Collins | Wyoming | 37–31 |
| 33 | February 28, 1927 | Laramie | Wyoming | 34–25 |
| 34 | February 24, 1928 | Laramie | Wyoming | 53–22 |
| 35 | February 25, 1928 | Laramie | Wyoming | 60–31 |
| 36 | February 23, 1929 | Laramie | Wyoming | 53–39 |
| 37 | February 24, 1929 | Laramie | Wyoming | 44–34 |
| 38 | January 18, 1930 | Laramie | Wyoming | 46–28 |
| 39 | January 18, 1930 | Laramie | Wyoming | 56–36 |
| 40 | February 20, 1931 | Laramie | Wyoming | 43–41 |
| 41 | February 21, 1931 | Laramie | Wyoming | 46–22 |
| 42 | February 20, 1932 | Fort Collins | Wyoming | 34–28 |
| 43 | February 22, 1932 | Fort Collins | Wyoming | 30–25 |
| 44 | February 24, 1933 | Laramie | Wyoming | 57–28 |
| 45 | February 25, 1933 | Laramie | Wyoming | 56–38 |
| 46 | February 25, 1934 | Fort Collins | Wyoming | 41–15 |
| 47 | March 1, 1934 | Fort Collins | Wyoming | 39–21 |
| 48 | February 23, 1935 | Laramie | Wyoming | 26–20 |
| 49 | February 24, 1935 | Laramie | Wyoming | 34–32 |
| 50 | February 21, 1936 | Fort Collins | Wyoming | 34–24 |
| 51 | February 22, 1936 | Fort Collins | Wyoming | 31–21 |
| 52 | February 19, 1937 | Laramie | Wyoming | 33–32 |
| 53 | February 20, 1937 | Laramie | Wyoming | 31–27 |
| 54 | January 27, 1938 | Laramie | Wyoming | 45–30 |
| 55 | February 26, 1938 | Fort Collins | Colorado A&M | 46–37 |
| 56 | February 3, 1939 | Fort Collins | Wyoming | 35–30 |
| 57 | February 24, 1939 | Laramie | Colorado A&M | 46–45 |
| 58 | January 12, 1940 | Laramie | Wyoming | 39–35 |
| 59 | February 2, 1940 | Laramie | Wyoming | 53–40 |
| 60 | February 7, 1941 | Fort Collins | Wyoming | 40–34 |
| 61 | February 28, 1941 | Laramie | Wyoming | 44–27 |
| 62 | February 15, 1942 | Laramie | Wyoming | 61–37 |
| 63 | March 7, 1942 | Fort Collins | Wyoming | 45–43 |
| 64 | January 22, 1943 | Fort Collins | Wyoming | 66–42 |
| 65 | January 23, 1943 | Laramie | Wyoming | 49–23 |
| 66 | February 12, 1943 | Laramie | Wyoming | 57–34 |
| 67 | February 13, 1943 | Fort Collins | Wyoming | 65–40 |
| 68 | February 9, 1945 | Fort Collins | Wyoming | 43–32 |
| 69 | March 2, 1945 | Laramie | Wyoming | 45–32 |
| 70 | February 16, 1946 | Laramie | Wyoming | 64–43 |
| 71 | March 9, 1946 | Fort Collins | Wyoming | 55–41 |
| 72 | January 14, 1947 | Laramie | Wyoming | 60–30 |
| 73 | March 8, 1947 | Fort Collins | Wyoming | 52–38 |
| 74 | January 17, 1948 | Fort Collins | Wyoming | 52–34 |
| 75 | February 28, 1948 | Laramie | Wyoming | 62–37 |
| 76 | January 28, 1949 | Fort Collins | Wyoming | 56–39 |
| 77 | February 11, 1949 | Laramie | #19 Wyoming | 56–43 |
| 78 | February 12, 1949 | Laramie | #19 Wyoming | 39–29 |
| 79 | December 8, 1949 | Denver | Wyoming | 49–42 |
| 80 | January 3, 1950 | Fort Collins | Wyoming | 41–38 |
| 81 | January 20, 1950 | Fort Collins | Wyoming | 46–41 |
| 82 | January 21, 1950 | Laramie | Wyoming | 56–45 |
| No. | Date | Location | Winner | Score | Notes |
| 83 | March 7, 1950 | Laramie | Wyoming | 50–41 | |
| 84 | December 28, 1950 | Denver | Wyoming | 62–50 | |
| 85 | January 12, 1951 | Fort Collins | #10 Wyoming | 56–47 | |
| 86 | January 13, 1951 | Laramie | #10 Wyoming | 77–58 | |
| 87 | January 26, 1951 | Laramie | #20 Wyoming | 54–34 | |
| 88 | January 27, 1951 | Fort Collins | Colorado A&M | 62–38 | |
| 89 | January 31, 1952 | Fort Collins | Wyoming | 58–45 | |
| 90 | March 5, 1952 | Laramie | #16 Wyoming | 89–57 | |
| 91 | February 7, 1953 | Laramie | Wyoming | 71–52 | |
| 92 | March 6, 1953 | Fort Collins | Wyoming | 54–53 | |
| 93 | February 5, 1954 | Fort Collins | Colorado A&M | 47–43 | |
| 94 | March 5, 1954 | Laramie | Wyoming | 52–44 | |
| 95 | February 5, 1955 | Fort Collins | Colorado A&M | 55–49 | |
| 96 | March 6, 1955 | Laramie | Wyoming | 69–46 | |
| 97 | January 28, 1956 | Fort Collins | Colorado A&M | 66–56 | |
| 98 | February 11, 1956 | Laramie | Colorado A&M | 66–56 | |
| 99 | January 26, 1957 | Fort Collins | Colorado A&M | 64–49 | |
| 100 | February 9, 1957 | Laramie | Wyoming | 65–56 | |
| 101 | February 1, 1958 | Fort Collins | Wyoming | 67–61 | |
| 102 | March 1, 1958 | Laramie | Wyoming | 70–62 | |
| 103 | January 31, 1959 | Fort Collins | Colorado State | 78–60 | |
| 104 | February 28, 1959 | Fort Collins | Colorado State | 80–74$^{OT}$ | |
| 105 | January 30, 1960 | Fort Collins | Colorado State | 69–50 | |
| 106 | February 27, 1960 | Fort Collins | Colorado State | 64–63 | |
| 107 | January 28, 1961 | Fort Collins | Colorado State | 73–55 | |
| 108 | February 25, 1961 | Laramie | Colorado State | 61–38 | |
| 109 | January 26, 1962 | Fort Collins | Colorado State | 56–50 | |
| 110 | February 24, 1962 | Laramie | Colorado State | 58–54 | |
| 111 | January 4, 1963 | Fort Collins | Colorado State | 91–70 | |
| 112 | January 12, 1963 | Laramie | Colorado State | 75–69 | |
| 113 | February 7, 1964 | Laramie | Colorado State | 66–56 | |
| 114 | February 9, 1964 | Fort Collins | Colorado State | 73–68 | |
| 115 | January 23, 1965 | Laramie | Wyoming | 77–68 | |
| 116 | February 6, 1965 | Fort Collins | Colorado State | 82–77 | |
| 117 | December 4, 1965 | Fort Collins | Colorado State | 75–69 | |
| 118 | January 22, 1966 | Fort Collins | Wyoming | 70–55 | |
| 119 | February 12, 1966 | Fort Collins | Colorado State | 75–68 | |
| 120 | January 14, 1967 | Laramie | Wyoming | 75–72$^{OT}$ | |
| 121 | February 11, 1967 | Fort Collins | Colorado State | 69–57 | |
| 122 | January 26, 1968 | Fort Collins | Wyoming | 84–68 | |
| 123 | February 10, 1968 | Laramie | Wyoming | 74–67 | |
| 124 | January 25, 1969 | Laramie | Colorado State | 78–68 | |
| 125 | January 31, 1969 | Fort Collins | Wyoming | 76–74 | |
| 126 | January 15, 1970 | Fort Collins | Wyoming | 88–87 | |
| 127 | January 17, 1970 | Laramie | Wyoming | 79–77 | |
| 128 | January 23, 1971 | Fort Collins | Colorado State | 74–51 | |
| 129 | February 6, 1971 | Laramie | Colorado State | 88–78 | |
| 130 | January 22, 1972 | Laramie | Colorado State | 68–66 | |
| 131 | February 5, 1972 | Fort Collins | Colorado State | 80–70 | |
| 132 | January 20, 1973 | Fort Collins | Colorado State | 61–59 | |
| 133 | February 17, 1973 | Laramie | Colorado State | 60–54 | |
| 134 | January 19, 1974 | Laramie | Colorado State | 57–46 | |
| 135 | February 16, 1974 | Fort Collins | Colorado State | 76–67 | |
| 136 | January 18, 1975 | Fort Collins | Colorado State | 78–60 | |
| 137 | February 22, 1975 | Laramie | Wyoming | 65–61 | |
| 138 | January 24, 1976 | Laramie | Colorado State | 51–41 | |
| 139 | February 21, 1976 | Fort Collins | Colorado State | 61–57 | |
| 140 | January 22, 1977 | Fort Collins | Wyoming | 74–64$^{OT}$ | |
| 141 | February 19, 1977 | Laramie | Wyoming | 65–63 | |
| 142 | January 21, 1978 | Laramie | Colorado State | 79–63 | |
| 143 | February 18, 1978 | Fort Collins | Colorado State | 82–70 | |
| 144 | February 2, 1979 | Fort Collins | Colorado State | 45–42 | |
| 145 | March 3, 1979 | Laramie | Wyoming | 70–65 | |
| 146 | March 1, 1980 | Fort Collins | Colorado State | 51–49 | |
| 147 | March 3, 1980 | Fort Collins | Wyoming | 67–64$^{OT}$ | |
| 148 | January 17, 1981 | Fort Collins | Wyoming | 85–54 | |
| 149 | February 21, 1981 | Laramie | Wyoming | 68–40 | |
| 150 | January 2, 1982 | Laramie | Wyoming | 51–31 | |
| 151 | February 27, 1982 | Fort Collins | Wyoming | 63–57 | |
| 152 | February 5, 1983 | Fort Collins | Colorado State | 50–48 | |
| 153 | March 10, 1983 | Laramie | Wyoming | 49–39 | |
| 154 | January 14, 1984 | Fort Collins | Wyoming | 69–63 | |
| 155 | February 9, 1984 | Laramie | Wyoming | 67–51 | |
| 156 | March 7, 1984 | Laramie | Wyoming | 40–36 | WAC quarterfinal |
| 157 | January 31, 1985 | Laramie | Wyoming | 54–53 | |
| 158 | February 22, 1985 | Fort Collins | Colorado State | 83–68 | |
| 159 | February 1, 1986 | Fort Collins | Wyoming | 68–66 | |
| 160 | February 22, 1986 | Laramie | Wyoming | 77–70 | |
| 161 | January 6, 1987 | Laramie | Colorado State | 74–71 | |
| 162 | February 14, 1987 | Fort Collins | Wyoming | 81–78$^{3OT}$ | |
| 163 | January 23, 1988 | Fort Collins | Colorado State | 54–49 | |
| 164 | February 20, 1988 | Laramie | #19 Wyoming | 57–50 | |
| No. | Date | Location | Winner | Score | Notes |
| 165 | March 11, 1988 | Fort Collins | #14 Wyoming | 60–58 | WAC semifinal |
| 166 | February 4, 1989 | Fort Collins | Colorado State | 58–48 | |
| 167 | February 25, 1989 | Laramie | Colorado State | 62–59 | |
| 168 | January 15, 1990 | Laramie | Colorado State | 65–57 | |
| 169 | February 3, 1990 | Fort Collins | Wyoming | 71–67 | |
| 170 | January 8, 1991 | Fort Collins | Wyoming | 75–63 | |
| 171 | February 26, 1991 | Laramie | Colorado State | 71–68 | |
| 172 | January 28, 1992 | Fort Collins | Colorado State | 68–67 | |
| 173 | March 7, 1992 | Laramie | Wyoming | 83–65 | |
| 174 | January 16, 1993 | Fort Collins | Colorado State | 92–77 | |
| 175 | February 20, 1993 | Laramie | Wyoming | 77–66 | |
| 176 | January 15, 1994 | Laramie | Wyoming | 73–58 | |
| 177 | February 19, 1994 | Fort Collins | Wyoming | 74–72 | |
| 178 | January 7, 1995 | Fort Collins | Wyoming | 70–69 | |
| 179 | February 25, 1995 | Laramie | Wyoming | 80–73 | |
| 180 | January 10, 1996 | Laramie | Colorado State | 68–63 | |
| 181 | February 24, 1996 | Fort Collins | Colorado State | 80–66 | |
| 182 | January 11, 1997 | Fort Collins | Colorado State | 78–71 | |
| 183 | February 6, 1997 | Laramie | Wyoming | 67–65$^{OT}$ | |
| 184 | January 24, 1998 | Laramie | Colorado State | 53–46 | |
| 185 | February 21, 1998 | Fort Collins | Wyoming | 69–64$^{OT}$ | |
| 186 | January 23, 1999 | Fort Collins | Colorado State | 91–83 | |
| 187 | February 20, 1999 | Laramie | Colorado State | 80–75 | |
| 188 | January 15, 2000 | Laramie | Colorado State | 77–71 | |
| 189 | March 4, 2000 | Fort Collins | Colorado State | 79–78 | |
| 190 | March 9, 2000 | Las Vegas | Wyoming | 74–68 | MWC quarterfinal |
| 191 | January 13, 2001 | Fort Collins | Wyoming | 70–69$^{OT}$ | |
| 192 | February 10, 2001 | Laramie | Wyoming | 72–70 | |
| 193 | January 12, 2002 | Laramie | Wyoming | 95–72 | |
| 194 | February 9, 2002 | Fort Collins | Wyoming | 72–69$^{OT}$ | |
| 195 | January 25, 2003 | Fort Collins | Wyoming | 79–77 | |
| 196 | February 22, 2003 | Laramie | Wyoming | 62–60 | |
| 197 | March 13, 2003 | Las Vegas | Colorado State | 74–71 | MWC quarterfinal |
| 198 | January 31, 2004 | Fort Collins | Colorado State | 75–74$^{OT}$ | |
| 199 | February 28, 2004 | Laramie | Wyoming | 67–61 | |
| 200 | January 29, 2005 | Laramie | Wyoming | 69–56 | |
| 201 | February 26, 2005 | Fort Collins | Colorado State | 96–94$^{OT}$ | |
| 202 | January 25, 2006 | Fort Collins | Wyoming | 72–67 | |
| 203 | February 25, 2006 | Laramie | Colorado State | 80–78 | |
| 204 | January 24, 2007 | Laramie | Wyoming | 75–70 | |
| 205 | February 24, 2007 | Fort Collins | Colorado State | 86–68 | |
| 206 | January 26, 2008 | Laramie | Wyoming | 73–58 | |
| 207 | February 27, 2008 | Fort Collins | Wyoming | 77–67 | |
| 208 | March 12, 2008 | Las Vegas | Colorado State | 68–63 | MWC first round |
| 209 | January 24, 2009 | Laramie | Wyoming | 83–74 | |
| 210 | February 25, 2009 | Fort Collins | Wyoming | 82–79 | |
| 211 | January 6, 2010 | Laramie | Colorado State | 83–73 | |
| 212 | February 6, 2010 | Fort Collins | Colorado State | 80–64 | |
| 213 | January 4, 2011 | Fort Collins | Colorado State | 73–60 | |
| 214 | February 5, 2011 | Laramie | Colorado State | 59–56 | |
| 215 | January 21, 2012 | Laramie | Wyoming | 70–51 | |
| 216 | February 18, 2012 | Fort Collins | Colorado State | 54–46 | |
| 217 | February 2, 2013 | Fort Collins | Colorado State | 65–46 | |
| 218 | March 6, 2013 | Laramie | Colorado State | 78–56 | |
| 219 | February 22, 2014 | Fort Collins | Colorado State | 82–67 | |
| 220 | March 8, 2014 | Laramie | Wyoming | 83–75 | |
| 221 | January 7, 2015 | Fort Collins | Wyoming | 60–54 | |
| 222 | February 4, 2015 | Laramie | Wyoming | 59–48 | |
| 223 | January 30, 2016 | Laramie | Wyoming | 83–76 | |
| 224 | February 20, 2016 | Fort Collins | Wyoming | 84–66 | |
| 225 | February 15, 2017 | Laramie | Colorado State | 78–73 | |
| 226 | March 1, 2017 | Fort Collins | Colorado State | 78–76 | |
| 227 | January 13, 2018 | Laramie | Colorado State | 78–73 | |
| 228 | January 31, 2018 | Fort Collins | Wyoming | 91–86$^{2OT}$ | |
| 229 | February 9, 2019 | Laramie | Wyoming | 74–66 | |
| 230 | February 23, 2019 | Fort Collins | Colorado State | 83–48 | |
| 231 | January 4, 2020 | Fort Collins | Colorado State | 72–61 | |
| 232 | February 15, 2020 | Laramie | Colorado State | 77–70 | |
| 233 | March 4, 2020 | Las Vegas | Wyoming | 80–74 | MWC First Round |
| 234 | February 4, 2021 | Laramie | Colorado State | 74–72 | |
| 235 | February 6, 2021 | Laramie | Colorado State | 68–59 | |
| 236 | January 31, 2022 | Laramie | Wyoming | 84–78$^{OT}$ | |
| 237 | February 23, 2022 | Fort Collins | Colorado State | 61–55 | |
| 238 | January 21, 2023 | Laramie | Wyoming | 58–57 | |
| 239 | February 24, 2023 | Fort Collins | Colorado State | 84–71 | |
| 240 | January 27, 2024 | Laramie | Wyoming | 79–76$^{OT}$ | |
| 241 | March 2, 2024 | Fort Collins | Colorado State | 70–62 | |
| 242 | January 18, 2025 | Laramie | Colorado State | 79–63 | |
| 243 | February 15, 2025 | Fort Collins | Colorado State | 88–53 | |
| Series: Wyoming leads 138–105 ||||||

## Women's basketball

University of Wyoming records list two women's basketball games played against Colorado State University during the 1973–1974 season, prior to Colorado State's inaugural season. According to Colorado State records, the first game played against Wyoming was on January 29, 1975, in Laramie.

### Game results

Source for results:
| Colorado State victories | Wyoming victories |
| No. | Date | Location | Winner | Score |
| 1 | 1973-1974 | Fort Collins | Wyoming | 42–26 |
| 2 | 1973-1974 | Laramie | Wyoming | 55–22 |
| 3 | January 29, 1975 | Laramie | Colorado State | 65–52 |
| 4 | March 1, 1975 | Fort Collins | Colorado State | 40–39 |
| 5 | December 12, 1975 | Fort Collins | Wyoming | 50–40 |
| 6 | February 21, 1976 | Laramie | Colorado State | 48–38 |
| 7 | December 18, 1976 | Laramie | Colorado State | 70–58 |
| 8 | February 12, 1977 | Fort Collins | Wyoming | 55–52 |
| 9 | December 5, 1977 | Laramie | Colorado State | 88–75 |
| 10 | February 25, 1978 | Laramie | Wyoming | 89–74 |
| 11 | February 28, 1979 | Fort Collins | Wyoming | 74–62 |
| 12 | December 15, 1979 | Laramie | Wyoming | 99–87 |
| 13 | January 25, 1980 | Laramie | Wyoming | 93–83 |
| 14 | February 23, 1980 | Fort Collins | Wyoming | 88–74 |
| 15 | January 6, 1981 | Laramie | Colorado State | 78–73 |
| 16 | January 17, 1981 | Fort Collins | Colorado State | 86–59 |
| 17 | February 21, 1981 | Laramie | Colorado State | 69–54 |
| 18 | January 2, 1982 | Laramie | Wyoming | 81–68 |
| 19 | February 27, 1982 | Fort Collins | Colorado State | 63–62 |
| 20 | February 5, 1983 | Fort Collins | Colorado State | 65–54 |
| 21 | March 5, 1983 | Laramie | Colorado State | 85–65 |
| 22 | January 28, 1984 | Laramie | Colorado State | 59–57 |
| 23 | February 25, 1984 | Fort Collins | Colorado State | 66–55 |
| 24 | February 2, 1985 | Fort Collins | Colorado State | 59–57 |
| 25 | March 2, 1985 | Laramie | Colorado State | 51–47 |
| 26 | February 2, 1986 | Fort Collins | Colorado State | 68–64 |
| 27 | March 1, 1986 | Laramie | Wyoming | 73–64 |
| 28 | January 27, 1987 | Laramie | Wyoming | 57–49 |
| 29 | February 21, 1987 | Fort Collins | Wyoming | 77–59 |
| 30 | January 30, 1988 | Fort Collins | Colorado State | 60–51 |
| 31 | March 5, 1988 | Laramie | Wyoming | 61–45 |
| 32 | February 11, 1989 | Fort Collins | Colorado State | 63–53 |
| 33 | February 25, 1989 | Laramie | Wyoming | 73–56 |
| 34 | February 3, 1990 | Fort Collins | Wyoming | 63–54 |
| 35 | February 17, 1990 | Laramie | Wyoming | 81–76 |
| 36 | March 8, 1990 | | Wyoming | 78–65 |
| 37 | January 19, 1991 | Laramie | Wyoming | 70–52 |
| 38 | February 16, 1991 | Fort Collins | Wyoming | 71–64 |
| 39 | February 1, 1992 | Fort Collins | Wyoming | 78–60 |
| No. | Date | Location | Winner | Score |
| 40 | February 29, 1992 | Laramie | Wyoming | 117–57 |
| 41 | January 16, 1993 | Laramie | Wyoming | 83–69 |
| 42 | February 13, 1993 | Fort Collins | Colorado State | 70–58 |
| 43 | February 19, 1994 | Laramie | Wyoming | 82–78 |
| 44 | March 5, 1994 | Fort Collins | Wyoming | 70–67 |
| 45 | January 20, 1995 | Laramie | Colorado State | 59–52 |
| 46 | March 2, 1995 | Laramie | Wyoming | 71–61 |
| 47 | January 20, 1996 | Laramie | Colorado State | 83–66 |
| 48 | March 1, 1996 | Fort Collins | Colorado State | 76–59 |
| 49 | January 11, 1997 | Laramie | Colorado State | 75–61 |
| 50 | February 6, 1997 | Fort Collins | Wyoming | 66–65 |
| 51 | January 24, 1998 | Fort Collins | Colorado State | 99–67 |
| 52 | February 19, 1998 | Laramie | Colorado State | 62–43 |
| 53 | January 23, 1999 | Laramie | Colorado State | 93–67 |
| 54 | February 20, 1999 | Fort Collins | Colorado State | 101–68 |
| 55 | January 15, 2000 | Fort Collins | Colorado State | 86–69 |
| 56 | February 11, 2000 | Laramie | Colorado State | 89–48 |
| 57 | March 8, 2000 | | Colorado State | 79–57 |
| 58 | January 13, 2001 | Laramie | Colorado State | 76–51 |
| 59 | February 10, 2001 | Fort Collins | Colorado State | 69–49 |
| 60 | March 7, 2001 | | Colorado State | 70–59 |
| 61 | January 25, 2002 | Fort Collins | Colorado State | 57–49 |
| 62 | February 23, 2002 | Laramie | Colorado State | 64–62 |
| 63 | February 1, 2003 | Laramie | Wyoming | 69–64 |
| 64 | February 28, 2003 | Fort Collins | Colorado State | 73–51 |
| 65 | March 12, 2003 | | Colorado State | 59–56 |
| 66 | March 23, 2003 | Fort Collins | Colorado State | 73–64 |
| 67 | January 30, 2004 | Laramie | Wyoming | 58–53 |
| 68 | February 27, 2004 | Fort Collins | Colorado State | 60–49 |
| 69 | March 10, 2004 | | Wyoming | 67–61 |
| 70 | January 28, 2005 | Fort Collins | Colorado State | 61–51 |
| 71 | February 24, 2005 | Laramie | Wyoming | 68–45 |
| 72 | January 25, 2006 | Laramie | Wyoming | 87–80 |
| 73 | February 25, 2006 | Fort Collins | Wyoming | 78–71 |
| 74 | January 27, 2007 | Fort Collins | Wyoming | 78–66 |
| 75 | February 25, 2007 | Laramie | Wyoming | 72–37 |
| 76 | January 26, 2008 | Fort Collins | Wyoming | 68–55 |
| 77 | February 27, 2008 | Laramie | Wyoming | 68–46 |
| 78 | January 24, 2009 | Fort Collins | Wyoming | 64–61 |
| No. | Date | Location | Winner | Score |
| 79 | February 25, 2009 | Laramie | Wyoming | 71–62 |
| 80 | March 10, 2009 | | Colorado State | 64–56 |
| 81 | January 5, 2010 | Fort Collins | Wyoming | 64–61 |
| 82 | February 6, 2010 | Laramie | Wyoming | 69–52 |
| 83 | January 5, 2011 | Laramie | Wyoming | 83–43 |
| 84 | February 5, 2011 | Fort Collins | Wyoming | 74–55 |
| 85 | January 21, 2012 | Fort Collins | Colorado State | 62–58 |
| 86 | February 18, 2012 | Laramie | Wyoming | 66–62 |
| 87 | February 2, 2013 | Laramie | Wyoming | 82–67 |
| 88 | March 6, 2013 | Fort Collins | Wyoming | 65–51 |
| 89 | March 14, 2013 | | Wyoming | 60–58 |
| 90 | February 22, 2014 | Laramie | Wyoming | 75–49 |
| 91 | March 7, 2014 | Fort Collins | Colorado State | 58–46 |
| 92 | March 14, 2014 | | Colorado State | 95–92 |
| 93 | January 7, 2015 | Laramie | Colorado State | 58–55 |
| 94 | February 4, 2015 | Fort Collins | Colorado State | 67–58 |
| 95 | January 30, 2016 | Fort Collins | Colorado State | 63–42 |
| 96 | February 20, 2016 | Laramie | Colorado State | 62–57 |
| 97 | February 15, 2017 | Fort Collins | Colorado State | 61–54 |
| 98 | February 28, 2017 | Laramie | Wyoming | 56–49 |
| 99 | January 13, 2018 | Fort Collins | Wyoming | 53–49 |
| 100 | January 31, 2018 | Laramie | Colorado State | 64–53 |
| 101 | February 9, 2019 | Fort Collins | Wyoming | 60–49 |
| 102 | February 23, 2019 | Laramie | Wyoming | 56–32 |
| 103 | January 4, 2020 | Laramie | Colorado State | 56–49 |
| 104 | February 15, 2020 | Fort Collins | Wyoming | 43–40 |
| 105 | February 4, 2021 | Fort Collins | Colorado State | 69–61 |
| 106 | February 6, 2021 | Fort Collins | Colorado State | 68–65 |
| 107 | February 16, 2022 | Fort Collins | Colorado State | 56–45 |
| 108 | March 2, 2022 | Laramie | Wyoming | 69–63 |
| 109 | March 7, 2022 | Las Vegas | Colorado State | 51–38 |
| 110 | February 4, 2023 | Fort Collins | Colorado State | 66–63 |
| 111 | February 25, 2023 | Laramie | Wyoming | 76–60 |
| 112 | March 7, 2023 | Las Vegas | Wyoming | 65–56 |
| 113 | January 20, 2024 | Laramie | Wyoming | 67–63 |
| 114 | February 17, 2024 | Fort Collins | Colorado State | 75–70 |
| 115 | January 25, 2025 | Laramie | Colorado State | 61–56 |
| 116 | March 1, 2025 | Fort Collins | Wyoming | 68–55 |
| Series: Tied 58–58 |||||