The Isle of Man TT or Tourist Trophy races are an annual motorcycle racing event run on the Isle of Man in May and June of most years since its inaugural race in 1907. The event begins on the UK Spring Bank Holiday at the end of May and runs for thirteen days. It is often called one of the most dangerous racing events in the world as many competitors have died.

The motorcycle sport of racing includes motorcycle road racing and off-road racing, both either on circuits or open courses, and track racing. Other categories include hill climbs, drag racing and land speed record trials.