High Quality Content by WIKIPEDIA articles! The 1976 Isle of Man TT was the fifth round of the 1976 Grand Prix motorcycle racing season. It took place between June 7 and June 12, 1976 at the Snaefell Mountain Course. 1976 marked the end of an era as it would be the last time the Isle of Man TT would appear on the Grand Prix calendar. Once the most prestigious race of the year, the event had been increasingly boycotted by the top riders, and finally succumbed to pressure for increased safety in racing events. The Grand Prix was moved to England in 1977 with the British Grand Prix being held at the Silverstone Circuit.