Born in Frazeysburg, Muskingum County, Ohio on July 28, 1830, Cyrus Mendenhall came to Montana in 1872. Mendenhall purchased the Hunters Hot Springs Hotel from Dr. A. J. Hunter (Man 6 in the group photo) in the winter of 1885, improved the facilities and, ten years later in 1895, sold the HHS Hotel property. Mendenhall died on November 11, 1921 in Livingston, Montana.

C. B. Mendenhall was a well-known businessman and rancher of Eastern Montana. He is mentioned in the 1902 reference work Progressive Men of the State of Montana.