Colorado Board of Governors identifies the following as peer institutions for CSU Fort Collins

Iowa State University (Ames, IA)
Kansas State University (Manhattan, KS)
Michigan State University (East Lansing, MI)
North Carolina State University at Raleigh (Raleigh, NC)
Oklahoma State University-Main Campus (Stillwater, OK)
Oregon State University (Corvallis, OR)
Purdue University-Main Campus (West Lafayette, IN)
Texas A & M University-College Station (College Station, TX)
The University of Tennessee-Knoxville (Knoxville, TN)
University of California-Davis (Davis, CA)
University of Illinois at Urbana-Champaign (Champaign, IL)
Virginia Polytechnic Institute and State University (Blacksburg, VA)
Washington State University (Pullman, WA)