The Cassells Hotel was approximately 65 miles west of Denver, Colorado, in the Platte Canyon. A railway depot and post office were located in the unincorporated settlement of Cassells, while another post office was located in the nearby settlement of Chase. The Cassells Hotel was established on the site of Cassells by David N. Cassell, who had moved to Colorado early in 1861. The original hotel was destroyed in a fire in 1886, and a new building was constructed. The Cassells Hotel was eventually sold to John L. Dower, the son-in-law of J.K. Mullen, a prominent entrepreneur in Denver and became part of a Santa Maria Catholic Youth Camp.