Washington, D.C. International Stakes
In his first start in a stakes race, Mongo won the second edition of the Lexington in 1962 for the Montpelier stable of Marion duPont Scott from the prominent du Pont family. Mongo's win marked the beginning of a very successful career in which he won a number of top turf races including the prestigious Washington, D.C. International Stakes which led to being voted the 1963 American Champion Male Turf Horse.