Billy Hofer was a Yellowstone National Park and Rocky Mountain guide.

Thomas Elwood Hofer was born in 1849 [estimated] to John Hofer and Mary Weeks. He lived in Chicago until 1972, when he came to the West. He gave tours of Yellowstone Park and Clark's Fork from 1880 to 1907 [approximate]. For a number of years he also served as a mail carrrier, guide, and army scout in Yellowstone, and was called "Uncle Billy." He also learned the art of photography while in the park. Hofer eventually applied for a lease to maintain a stable and corral at Mammoth in order to conduct his guiding business. In 1907 Hofer received a 10-year lease to operate boats on Yellowstone Lake. He formed the T.E. Hofer Boat Co. In 1908 he bought out the E.C. Waters, Yellowstone Lake operation. Articles of incorporation were filed in March of 1908, and included three directors: Hofer, W.A. Hall, and C.N. Sargent. His company operated the ferry service with the ‘Zillah’ from West Thumb to Lake Hotel, provided fishing boats to hire for visitors, and he operated the businesses in conjuction with his boat operations. Financing for the buyout of the E.C. Waters' was obtained from H.W. Child and the Northern Pacific Railroad. In 1910 Child bought out Hofer's interests. He guided some notable people through Yellowstone, including Theodore Roosevelt. He ran a number of businesses through which he conducted his guiding. Billy Hofer died on April 23, 1933 in Clinton, Washington.

Lee H. Whittlesey (1950-) worked in the National Park service for many years.

Lee H. Whittlesey was born on February 2, 1950 in Oklahoma. He began his career for the National Park Service at the age of 18, working in the NPS personnel office. He loves backpacking and hiking, and found these hobbies through working in the NPS. He graduated from the University of Oklahoma, and moved to Yellowstone after school. There, he became the head of tour guides and buses, and he then became the law enforcement ranger in West Yellowstone after attending law school at the U of Oklahoma in 1983. He has published many books about the Yellowstone area, and has become a well known environmental historian.