The International Motor Contest Association was organized in 1915 by J. Alex Sloan, and is currently the oldest active auto racing sanctioning body in the United States. IMCA is currently headquartered in Vinton, Iowa, and features several classes and divisions of weekly racing in six geographical regions of the United States. The IMCA championships are held annually at the IMCA Supernationals at Boone Speedway in Boone, Iowa.
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