Hepburn entered competition in 1948, and set an unofficial Canadian record at his first competition. He took the U.S. Open title in 1947, by pressing 345 lbs. Hepburn set another Canadian weightlifting record in 1950 and went on to win a gold medal at the 1953 World Weightlifting Championships in Stockholm with a 1030 lbs Olympic 3-lift-total. After years of trying to attract public interest, the win in Stockholm had finally catapulted him into the media spotlight. During his preparations for the 1954 British Empire Games in his hometown of Vancouver, the whole city got behind him, and he was given $150 a week while training in a gym by then-mayor Fred Hume. At the Games, Hepburn would claim another weightlifting gold medal in the heavyweight division by lifting a total of 1040 lbs to set a new Games record becoming a Canadian national hero. He was awarded the Lou Marsh Trophy in 1953 and was named British Columbia's Man of the Year for 1954.
While training for the weightlifting championships, Hepburn performed as a strongman at two to three shows a week across Canada, ripping licence plates, crushing cans of oil, and lifting weights with his baby finger, as well as more traditional lifting: shoulder presses, squats, bench presses, two-handed curls. His accomplishments as a strongman were nothing short of astounding. Some of his strength feats he made during his career include:
One-Arm Military Press: 200, and 37 reps with 120 pounds
Two-Hand Barbell Curl: 260 pounds
Bench Press: 580 pounds
Squat: 800 pounds
Deadlift: 800 pounds
Crucifix: 110-pound dumbbells in each hand
One-Arm Side Hold-Out: 120 pounds
One-Arm Side Press: 250 pounds
Hepburn also became the first man in history to bench press 400, 450, and 500 pounds. He set a series of bench press world records in the early 1950s: In November 1950 he pressed 400 lbs, in 1951 he pressed 450 lbs, and finally 500 lbs in December 1953. Like his father and stepfather, Hepburn battled with alcoholism and consequently suffered from depression. After his triumphs in the early 1950s, he became a professional wrestler for a brief period of time.
Wrestling
After his successes as a weightlifter, he became a professional wrestler. He was originally approached by San Francisco-based wrestling promoter Joe Malcewicz, but Hepburn turned down the offer. He later got involved in the business when he agreed to perform feats of strength at wrestling events promoted by Whipper Billy Watson and Toronto promoter Frank Tunney. In December 1954, he signed what was announced as a five-year contract with Tunney. After being trained by Watson and Pat Fraley, Hepburn defeated Frank Marconi in his debut match on March 27, 1955. He later wrestled Yukon Eric and Fritz Von Erich and partnered with Antonino Rocca and Watson. Hepburn quit working for Tunney in 1956; he had one more brief stint as a wrestler while working for Cliff Parker in British Columbia before retiring.
Other careers
Hepburn was a singer and songwriter, releasing a Christmas tune, the "Hepburn Carol". He had literary ambitions and had a large output of essays and poems and other writings. At the age of 37, Hepburn opened his own gym. In his later years, he custom built gym equipment and marketed protein powder and other sports supplements.