Federal Repositories
- National Archives and Records Administration (NARA) – Denver
- U.S. Geological Survey (USGS)
- Bureau of Land Management (BLM)
State Repositories
- Stephen H. Hart Library – History Colorado Center
- Colorado State Archives
- Colorado Department of Public Health and Environment
County Repositories
Local Repositories
- Denver Public Libraries – 5th Floor – Department of Western History and Genealogy
- Blair Caldwell African-American Research Library (Denver Public Library System)
- Jefferson County Public Libraries
- Golden History Museum
- Penrose Library – Pike Peak Library District
Academic Repositories
- Colorado School of Mines – Arthur Lakes Library
- Iliff School of Theology
- Ira M. and Peryle Hayutin Beck Memorial Archives
- Norlan Library – University of Colorado, Boulder