Harold N. Holt was raised with some of the best horseflesh in the West.  His dad, Dr. Robert Holt, imported several mares and stallions from the United States for the purpose of breeding good race stock.

Harold actually started his horseracing career in 1967, with a three-year old horse named "Timothy Adios", which he purchased from Lorne Clark of Regina. Harold kept the horse at the farm in the winter, then brought him to town in the spring to train at the Exhibition grounds. He had the horse for five years;[in which time he won two or three times each summer at races in Calgary, Edmonton, Saskatoon and Regina. His best racing time was 2:11.

Harold went on to raise other horses. He raised two colts (born in 1969) "Bojack" and "Hustler Honey". They were broken in by Ken Maccomish, and later trained in Saskatoon by Bill Ruttle. By the age of three they were both winners, with "Hustler Honey" winning the most. Her best time was 2:07. "Bojacks" was 2:04. In 1972 a "Hustlers Babe" (a Senga Der and Satan's Hustler colt) was foaled. "Henderson Hassle", sired by Adios Pick and out of Cue See, was born in 1975. This horse won the Lieutenant Governor Stakes in 1978 in Edmonton. That some year she was sold to an Edmonton stable for the highest price ever paid for a standard bred horse to stay and race in Alberta. The bloodlines of this horse can be traced back as far as 1910 to some of Dr. R. Holt’s imported mares and stallions.

In addition to his "horse racing enterprise, Harold ran the feed store in Lloydminster for twenty years until 1978 and had other hobbies. For many fair parades, crowds lining the parade route were entertained by a 1910 Case Steam Engine Harold had bought and restored. It was of special interest to the people from the north side of the North Saskatchewan River, as the engine was an essential part of the sawmills, in use in the 1930's. No Lloydminster parade was complete without the huge steam engine, emitting a shrill steam generated whistle, at unexpected intervals, and operated by Harold Holt.

After leaving the feed business Harold continued to spend his days with his race horses on the farm located just outside Lloydminster. He built a race track where he could break and train his own harness horses. Harold and his wife Jeanne continue to make their home in Lloydminster.