Heading into their annual showdown on the gridiron on Nov. 22, 1958, Colorado and Colorado State both knew it would be their last meeting for a while.
By then, it had been 11 years since the two in-state rivals were in the same conference. After the 1947 season, CU left the Mountain States Conference to join the Big Six.
The rivalry no longer carried the importance it once did, and the Buffaloes didn't come close to filling Folsom Field when the Rams came to town.
It was time to move on, and after that 1958 meeting — a 15-14 CSU win — the two schools did just that.