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A Pennsylvania Thoroughbred Company.

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Birthplace of 2011 Kentucky Oaks Winner
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Stable Manager of 2005 Horse of the Year

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Racing & Training

Walnut Green offers a complete line of racing and training services from stable management to new for 2014, a racing stable for the Mid-Atlantic.


The Walnut Green Farm encompasses over 100 acres in the beautiful horse country of Unionville, Pennsylvania. We offer a full line of breeding and farming services for your horses.

Private Sales

A Walnut Green specialty. Mark Reid/Walnut Green have been responsible for the private purchases/sales of Medaglia d’Oro, You, Spoken Fur, and many others.

Public Sales

Walnut Green attends virtually all domestic sales with the ability to represent both buyers and sellers. The 2011 Kentucky Oaks winner Plum Pretty, bred at Walnut Green, was offered through our public consignment.

  • "Because of Mark Reid, I've had several stake horses in my barn...One being the best horse I ever trained, Smarty Jones." - Trainer John Servis
  • "Everything that Mark Reid has bought for us has been a fantastic WIN WIN WIN." - Owner Edmund Gann
  • "Mark and I go back to the Frankel days together. He finds winners." - Trainer Chad Brown
  • "Mark Reid managed the career of my horse of the year Saint Liam. The results speak for themselves." - Owner William K. Warren, Jr.
  • "I consult with Mark regarding my stable on a regular basis." - Trainer Kiaran McLaughlin