Australian International Three Day Event Horse Trial Arena

The Australian International Three Day Event is an annual three-day event held in the South Australian capital of Adelaide. It was known as the Adelaide International Horse Trials up until 2007.

It comprises dressage, cross-country and show-jumping and is usually staged in early November. It is one of only six events in the world to receive a four star (Olympic-standard) rating under Concours Complet International.

The event is unique in being held in a city-centre, taking place in the picturesque Adelaide Park Lands.