Edward T. (1979). Rails That Climb. Boulder, Colorado: Johnson Publishing Company. . Bollinger, Rev. Edward T. & Bauer, Frederick. (1981). The Moffat Road. Athens, Ohio: Ohio University Press. . Bowles, Samuel. (1869). The Switzerland of America: A Summer Vacation in the Parks and Mountains of Colorado. Norman, Oklahoma: University of Oklahoma Press. . Boner, Harold A. (1962). The Giant's Ladder. Milwaukee, Wisconsin: Kalmbach. . Church, Minette C. et al. (2007). Colorado History: A Context for Historical Archaeology. Denver, Colorado: Colorado Council of Professional Archaeologists. . Crossen, Forest. (1976). Western Yesterdays: David Moffat's Hill Men. Fort Collins, Colorado: Robinson Press, Inc. . Griswold, P.R. "Bob." (1995). David Moffat's Denver, Northwestern and Pacific. Denver, Colorado: Rocky Mountain Railroad Club. . Griswold, P.R. "Bob." (2010). The Moffat Road 2-26-28. Aurora, Colorado: Double R Publishing. Hitchcock, F.C., and C.C. Tinkler. (1927). The Contractors' Story of the Moffat Tunnel: Not an Engineering Treatise. Denver, Colorado: Hitchcock & Tinkler. LaBelle, Jason M. & Pelton, Spencer R. (2013). Communal hunting along the Continental Divide of Northern Colorado: Results from the Olson game drive (5BL147). Quaternary International: Volume 297, May 29, 2013, Pages 45–63. Miller, Wick R. (1986). Numic Languages in Handbook of North American Indians, Volume 11: Great Basin. Washington, D.C.: Smithsonian Institution. . Sells, John A. (2011). The Moffat Line: David Moffat's Railroad Over And Under The Continental Divide. Bloomington, Indiana: iUniverse Publishing. . Sprague, Marshall. (1964). The Great Gates: The Story of the Rocky Mountain Passes. Boston, Massachusetts: Little, Brown and Company. . Sundquist, Elizabeth Josephson. (1994). Dismantling the Rails that Climbed. Denver, Colorado: Egan Printing Company. Wright, B. Travis & Wright, Kate. Foreword by Jason M. LaBelle, PhD. (2018). Rollins Pass. Charleston, South Carolina: Arcadia Publishing. . Wright, B. Travis & Wright, Kate. Foreword by Jason M. LaBelle, PhD. (2018). Rollins Pass. Charleston, South Carolina: Arcadia Publishing. . Wright, B. Travis & Wright, Kate. (2018). Rollins Pass. Charleston, South Carolina: Arcadia Publishing. . Wright, B. Travis & Wright, Kate. (2022). Rollins Pass: Past & Present. Charleston, South Carolina: Arcadia Publishing. . External links Google Maps view of the Rollins Pass summit Artist renderings of the rail line over Rollins Pass Rail mountain passes of the United States Mountain passes of Colorado Landforms of Boulder County, Colorado Landforms of Gilpin County, Colorado Landforms of Grand County, Colorado Denver and Rio Grande Western Railroad Tourist attractions in Boulder County, Colorado Tourist attractions in Grand County, Colorado