The Tire Rack One Lap of America is a motor sports event in the US that has been held since 1984. It is the successor to the Cannonball Sea-To-Shining-Sea Trpohy Dash, an underground car race of the 1970s.

The original premise for both is to drive cross-country, but the One Lap of America respects speed laws.

Both events are the creation of automotive journalist Brock Yates.

Check out the 2014 Schedule

Competition occurs as time trials held at various race tracks around the country. The competitors drive from race track to race track, (often driving 24 hours at a time) without the benefit of support crews. The field of competitors is divided into several classes based primarily on original manufacturers suggested Retail prices and number of doors. Competitors may make any modifications to their vehicles as they see fit but must run on a single set of tires, typically provided by the race sponsor, throughout the entire event. Race track events are time trials with up to eight cars on track at a time. Competition is for fastest time rather than wheel-to-wheel racing.