I'll be moving to Denver (not w-CO, i know) this summer. According to the Alumni site all Catbacker Clubs must be within KS...
Catbacker Clubs
Catbacker Clubs are co-sponsored by K-State Athletics and the K-State Alumni Association. These groups are located only within the state of Kansas.
However, you could start a spirit club...
Spirit Clubs are groups of K-State alumni and friends outside of Kansas who gather for football and basketball Watch Parties.