A proud tradition was born on May 1, 1916, when Harry Sinclair formed Sinclair Oil from the assets of eleven small petroleum companies. Sinclair quickly grew to become the seventh largest oil company in the United States. The original Sinclair Oil Company began marketing the apatosaurus (brontosaurus) in 1930 and now after more than 70 years, "Dino" still remains one of the most recognizable corporate logos in the world.

Sinclair is headquartered in Salt Lake City, Utah, and is the nucleus of a corporation that includes Snowbasin Resort in Ogden, Utah (site of the 2002 Downhill Courses), as well as Sun Valley Resort in Idaho. One of the most prominent properties of Sinclair is Little America, a beautiful hotel, travel center and restaurant located on I-80 in western Wyoming. The Little America name has also been given to other properties, one of which is one of the most luxurious hotels in Salt Lake City. The company recently opened Salt Lake City's first 775 room luxury hotel, The Grand America. Sinclair Oil owns and operates three refineries, two in Wyoming and one in Oklahoma. Marketing fuel in 21 states and supplying fuel to over 2,600 company and distributor operated stations makes the Sinclair brand a prominent and welcome sight to the motoring public.

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