Bay Bolton or Brown Lusty (1705–1736) was a British Thoroughbred racehorse who won Queen Anne's Gold Cup as a five-year-old in 1710.
Bred by Sir Matthew Pierson, he was a son of Grey Hautboy and a Makeless mare.
[2] At York in 1710, Bay Bolton (then a five-year-old) beat eight six-year-olds to win Queen Anne's Gold Cup.
His progeny included Bonny Lass, Fearnought, Looby, Starling (a Champion sire) and Whitefoot.
* Bay Bolton is inbred 4D × 4D x 4D to the stallion D'Arcy Yellow Turk, meaning that he appears thrice fourth generation on the dam side of his pedigree.