Barbury International Horse Trials - a great family day out at the beautiful Barbury Castle Estate. Whether you are a keen equestrian or an enthusiastic beginner Barbury Horse Trials has something for everyone.Set in the beautiful Barbury Castle Estate, home of the Wiltshire County Show. Barbury Horse Eventing is an entertaining and fun day out. Watch world class riders compete in the equestrian horse trials with disciplines in dressage, show jumping and cross country.