The farm was founded in the 1870s by the wealthy tobacco manufacturer Pierre Lorillard IV (1833-1901) who had a home in the town of Rancocas, now a part of Westampton Township, New Jersey.

Lorillard built his stable into one of the premier thoroughbred breeding and training operations in the United States.

Ridden by the champion English jockey, Fred Archer, Iroquois won The Derby then went on to also capture the St. Leger Stakes.

For Sinclair, trainer Sam Hildreth brought the stable victories in the Kentucky Derby and in three Belmont Stakes.

Sinclair's Rancocas Stable set the record as top money winner in a single season in 1923 that stood until 1941 when it was broken by Calumet Farm.