Blue Light (foaled 1958 in Ontario) was a Canadian Thoroughbred racehorse.
Blue Light was a bay horse bred in Ontario by E. P. Taylor.
His dam, Blen Lark, was a daughter of Blenheim, the 1930 Epsom Derby winner and Leading sire in North America in 1941.
Blue Light was purchased and raced by eighty-one-year-old Col. Kenric R. Marshall, a decorated World War I soldier who later commanded the 48th Highlanders of Canada, who was a highly successful businessman.
Blue Light showed little promise as a two-year-old in 1960 but who won the 1961 Queen's Plate, Canada's most prestigious race and North America's oldest annually run stakes race.