Mark R. Frostad (born January 19, 1949) is a Canadian thoroughbred horse trainer. Born in Brantford, Ontario, he grew up with a father who owned a stud farm but before becoming involved in thoroughbred horse racing, Frostad obtained a BA degree in literature from Princeton University then in 1976 an MBA degree from the University of Western Ontario in London, Ontario,. Frostad has won the Sovereign Award for Outstanding Trainer three times. His significant horses include Quiet Resolve, Chief Bearhart, and Soaring Free, all winners of the Sovereign Award for Canadian Horse of the Year.