Cryptocloser (1994–2000) was a Canadian Thoroughbred Champion racehorse. He was sired by multiple Grade I winner Cryptoclearance, and his damsire was Northern Dancer's son, Vice Regent. The colt was owned in partnership by American businessman and future United States Ambassador to Finland Earle I. Mack, and Mississauga, Ontario businessman William A. Sorokolit, Sr.Cryptocloser was trained by Mark Frostad.