More than 400 competitors from four continents are competing in the 78th Annual All-American Soap Box Derby.

The competition in Akron takes place all day Saturday, with elimination heats of three and winners advancing in a bracket format with the finals taking place in the afternoon. There are three classes — Stock, Super Stock and Masters. The races traditionally draw more than 10,000 fans.

Notable alumni of the event include the late Johnny Carson, NASCAR President Mike Helton, 1983 Indianapolis 500 champion Tom Sneva and Heisman Trophy winners Paul Hornung and Pete Dawkins.