Lauren Nicholson’s eventing career has been made on U.S.-bred horses like Snooze Alarm, Vermiculus, and Landmark’s Monte Carlo, many of which are products of Jacqueline Mars’ breeding program out of her Landmark Stables at Stonehall Farm in The Plains, Virginia.

After years spent as a professional rider working with young and difficult horses, Jayne Lloyd knew what kind of sport horses she wanted to produce when she got into breeding 12 years ago—competitive, rideable, and trainable that would be suitable for amateurs.