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The Knoxville Raceway, located on the Marion County Fairgrounds, began as a track for horse racing. The first automobile race was held in 1901. Johnny Gerber and "Speed" Adams were among the drivers featured between 1927 and 1936 during racing’s growth in popularity.

Racing came to a halt in the early 1940s due to the war, and returned late in the decade with hot rod racing. Soon after, midget and stock car racing became common.

In 1954, weekly racing began at the Knoxville Raceway. By this time, lighting was added to the track, along with new fencing. Stock car racing was the primary attraction, which were passenger cars stripped of glass, innards and extra metal. Roll cages were often constructed inside the car as a safety precaution.

Events at the Knoxville Raceway were promoted by the Southern Iowa Stock Car Racing Association until 1956, when Marion Robinson took over as promoter. During Robinson's tenure, "modifieds", (a stock car with modifications made to the engine), and "supermodifieds" (modifieds with the car bodies cut away to eliminate weight), were the rage. Eventually, tubing replaced the car frames, giving way to the sprint car as we know it today. Under Robinson's leadership, the Knoxville Nationals were born.

P. Ray Grimes came into leadership at the Knoxville Raceway in 1974, promoting races until 1977. Grimes' legacy includes extending the length of the Knoxville Nationals to four days.

1977 brought about a new Race Director, Ralph Capitani. Capitani continued to build on the growth of his predecessors, increasing the payoff for the 4-day Knoxville Nationals event to $100,000. The first tape-delayed broadcast of the Nationals was in 1987, with the first live broadcast in 1993.

Known as the "Sprint Car Capital of the World," Knoxville Raceway is home to the most prestigious Sprint Car event on the planet—the Knoxville Nationals, often called "The Granddaddy of 'Em All." For Sprint Car racing, it's the equivalent of the Super Bowl.

Each August, more than 100 Sprint Cars from across the country descend on Knoxville to chase one of the sport's biggest prizes. While it doesn't offer the richest winner's check, the Knoxville Nationals boasts the largest overall purse in Sprint Car racing, with more than $1 million on the line.

The legendary half-mile also keeps fans entertained all season long as a weekly racing destination featured on DIRTVision, bringing Knoxville's action to race fans around the world.