Stonewall Farm Westchester County, New York

This exceptional 740-acre estate is the largest privately-owned property in the county.

Located just an hour from New York City, this exceptional estate is set on 740 acres of rolling hills, apple orchards, woodlands and ponds, and is the largest privately-owned property in the county. For the past four decades, the land has been dedicated to raising championship thoroughbred racehorses, so it comes as no surprise that the property has expertly maintained grounds, riding trails, round pens, a turf racetrack, a 40-stall yearling barn, and fenced paddocks and pastures with run-in sheds.

The colonial-style manor house spans 24,000 sq ft over four stories. There are eight bedrooms and eight full bathrooms; the master suite is a secluded haven with a Japanese-inspired indoor garden and a vast stone-and-wood soaking tub that overlooks the front paddock. There are subtle references to the equestrian lifestyle throughout, such as saddle-leather tiles accenting the fireplace, office and elevator.

There is a two-story library; 2,200-bottle wine cellar and tasting room; and elegant sunroom (the current owners’ favorite space). Outside, the formal grounds (designed by Edmund D. Hollander) are a bucolic dream: weeping willows, fragrant lavender, wisteria, a koi pond and a butterfly house. Beyond the gardens lies a 4,000-sq-ft pool house with a 60-ft swimming pool and spa, gym, sauna, changing rooms, kitchen and lounge area complete with a stone fireplace.