“Is that the really dangerous road race?”
It’s a week-long event with many individual motorcycle races of various classes. It’s well known as the most dangerous motor racing event in the world.
On par with the North West 200 (Northern Ireland), Manx GP (the August meeting at IOM for amateur riders, but officials may have sidecar races with professionals allowed since their IoM TT races were scratched), and China’s Macau Motorcycle GP, which is just as dangerous as the IoMTT. Only one MotoGP world champion won Macau.