 In 2006, the track's first year of operation, it hosted the Utah Grand Prix with the American Le Mans Series, a Honda Summit of Speed AMA Superbike double-header event, and the Discount Tire Sunchaser, a nine-hour endurance race of the Rolex Sports Car Series.The Sunchaser was shortened to 1,000 km (620 miles) for 2007 and 2008, and to 250 miles for 2009 and 2010.The track is also host to a WERA Grand National motorcycle roadracing event and the regional motorcycle road racing series Masters of the Mountains, promoted by the Utah sport bike association.