During their pre-BIG12 run in which they were ranked no lower than 20 when they played Texas teams they knew the value of being in the state every year. Then they got shut out because they left the conference. After joining the PAC 12 they played Texas State in 2017 so that is one Texas opponent between 2011 and 2019 and it was on the PAC12 Network.
September 4, 1989 5:30 pm Texas* No. 14 Folsom Field Boulder, Colorado ESPN W 27–6 47,269
September 22, 1990 5:30 pm at No. 22 Texas* No. 20 Texas Memorial Stadium Austin, TX ESPN W 29–22 77,373
September 14, 1991 12:00 pm No. 23 Baylor* No. 12 Folsom Field Boulder, Colorado KCNC L 14–16 50,754
September 12, 1992 11:00 am at Baylor* No. 12 Floyd Casey Stadium Waco, TX KCNC W 57–38 34,202
September 4, 1993 5:30 pm Texas* No. 11 Folsom Field Boulder, Colorado ESPN W 36–14 52,125
September 11, 1993 12:00 pm No. 24 Baylor* No. 10 Folsom Field Boulder, Colorado KCNC W 45–21 50,281
October 1, 1994 1:30 pm at No. 16 Texas* No. 5 Texas Memorial Stadium Austin, TX ABC W 34–31 77,809
September 23, 1995 1:30 pm No. 3 Texas A&M* No. 7 Folsom Field Boulder, Colorado (College GameDay) ABC W 29–21 53,849 (Poooor Aggggy)
In addition to playing in Texas they were playing Notre Dame and Michigan with lots of national exposure. The above run is why us olds remember Colorado as a really good program instead of the garbage they are today.