Though he grew up in Ensley, Harmon moved to Prattville after high school and there began a long career as a racing promoter. He organized short track events throughout the southeast, including the Montgomery Speedway, which he owned for fifteen years. He was also associated with the Five Flags Speedway in Pensacola, Florida and the Middle Georgia Speedway. His "All American 400" at the Nashville Fairgrounds Speedway became a major attraction on the stock car circuit. Along with stock car races, Harmon operated a hot dog stand in Millbrook. His annual hot-dog eating contest offered a $1000 grand prize and was showcased on ABC's "Wide World of Sports".
Harmon died of lung cancer in 2002. He was survived by his wife, Nita, two children and one granddaugher. The Uncle Bob Harmon All Pro 200 at the Birmingham International Raceway was named in his honor.
- Altman, Ozzie (May 30, 2002) "Bob Harmon: A promoter of goodwill and friendship" Motorsport.com