July 24, 1977		Hallett Motor Racing Circuit, Tulsa, OK	IMSA GTU	Walter Maas
July 31, 1977	Star Buildings Trans Am	Hallett Motor Racing Circuit, Tulsa, OK	SCCA Trans Am	Peter Gregg
May 7, 1978		Hallett Motor Racing Circuit, Tulsa, OK	IMSA GT	David Hobbs
May 7, 1978		Hallett Motor Racing Circuit, Tulsa, OK	IMSA GTU	Dennis Aase
May 13, 1979		Hallett Motor Racing Circuit, Tulsa, OK	IMSA GT	David Hobbs
May 13, 1979		Hallett Motor Racing Circuit, Tulsa, OK	IMSA GTU	Dennis Aase
June 1, 1980		Hallett Motor Racing Circuit, Tulsa, OK	SCCA Trans Am	John Bauer
October 25, 1986	Gold Cup Challenge	Hallett Motor Racing Circuit, Tulsa, OK	CAT Can Am Teams	Al Lamb
June 7, 1987		Hallett Motor Racing Circuit, Tulsa, OK	CAT Can Am Teams	Al Lamb
June 17, 1990		Hallett Motor Racing Circuit, Tulsa, OK	American IndyCar Series	Bill Tempero
June 2, 1991		Hallett Motor Racing Circuit, Tulsa, OK	American IndyCar Series	Bill Tempero
June 21, 1992	Oklahoma IndyCar Grand Prix	Hallett Motor Racing Circuit, Tulsa, OK	American IndyCar Series	Bill Tempero