53rd US National Speedway Championship September 23rd. Costa Mesa Speedway Event Sports 53rd US National Speedway Championship September 23rd. Costa Mesa Insider Editor September 19, 2023 September 19th 2023: The 53rd U.S. National Speedway Championship is happening this Saturday September 23rd at the Costa Mesa... Read More Read more about 53rd US National Speedway Championship September 23rd.
