It has many configurations, and its tight layout with lots of run-off space makes it a very good venue for race testing. Many race teams from Toronto and Montreal test at Shannonville in preparation for events held on street circuits, as the Shannonville raceway shares a lot of the same characteristics.
The raceway first started off as a dirt oval, with bedrock for a front straight. Much later, the 1.8km "Nelson" circuit was built, named after the late John Nelson, owner of the circuit at the time. From there, the 2.23km "Fabi" circuit was built north of the Nelson, and the two were linked to form the 4.03km, 14-corner "Long Track". The Fabi circuit was named after Bertrand Fabi, a young Canadian driver who died while testing a Formula 3 car in England. The Fabi circuit has a long backstraight that now doubles as a drag strip. A link was then made after the first corner on the Nelson circuit to the seventh corner of the Long Circuit, creating the 2.47km "Pro Circuit" layout.
The Ariel Atom Experience is currently taking place on that circuit