For over 20 years, John Clark combined his personal passion for all things speed-related with a professional career. Starting with casual photographs of APBA powerboat racing, Clark refocused his efforts on automobile racing. Clark covered a variety of racing series including NASCAR, CART, IRL, SCORE off-road truck racing, the Pikes Peak Hill Climb, and NHRA drag racing, with many of his images published in national and regional racing and automotive magazines.

The John Clark racing photographs consist of 35mm color slides, photographic prints, and negatives covering an array of races including motocross motorcycles, off-road trucks, Indy cars, and various levels of stock car racing including Busch Grand National series, Craftsman Truck series, and Winston Cup series. Most of the races took place in Arizona, California, Colorado, Florida, and Nevada with additional races held in North Carolina and Pennsylvania.