Jim Mueller has participated in 81 consecutive Cheyenne Frontier Days and has been a volunteer for 55 years. When he first attended, he was in diapers and his father, E.A. Mueller was in the Wild Horse Race in 1935. When he was 13 and 14 years old, he volunteered as an outrider for the parades. During the summers, he worked for the Boices' on the PO Ranch, and they brought horse teams to town for the parades. The Boices' had a barn in downtown Cheyenne where the horses were kept during the week for parades, and Jim would care for them. When Jim turned 15, he began working with the stock contractor, Verne Elliott, in the arena. He loaded bucking stock, worked the chute slide gates, took the wild horses to the race track and sorted the stock horses.

In 1963, Bob Boice contracted Jim to work on Chute 9 and then in 1964 he joined the Contestants Committee, where he was in charge of barriers and cattle.
Working with Dan Taylor, he was in charge of and worked at Chute 9 until 2003.
Jim also worked with Don Kensinger putting together the timed event livestock.

When the Contestants building was under construction, Jim donated over $1,500 and hours of labor to complete the project. He became Contestant Committee Chairman in 2004, and after his term was over, he returned to Chute 9, opening
the chute gate to let roping cattle out. While serving as the Contestants Chairman, he also served on the committee's advisory board to the PRCA board. Jim also served on the Hall of Fame Committee for six years.

From the early 1960s, Jim was active year round and would put in twelve to seventeen hour days over Cheyenne Frontier Days. In addition to his Contestants
Committee work, Jim became a HEEL in 1971, where he has been active from that day forward. From 1982-1984, he worked on dual committees, both the Contestants and the Public Relations Committee. He was able to get contestants to
do interviews with the media. Jim also competed in the Wild Horse Race for two years, roped steers in the PRCA for 32 years, roped in the Senior Steer Ropers Association for 29 years, and went to the CFD finals in 1997 where he finished fifth.