The Leaky Cauldron

Didn't it go on a 100 year long hiatus because of a participnt death?

I'm not sure if it is ever stated exactly how long the hiatus was, but it is "centuries", plural is implied:

‘The schools took it in turns to host the Tournament once every five years, and it was generally agreed to be a most excellent way of establishing ties between young witches and wizards of different nationalities – until, that is, the death toll mounted so high that the Tournament was discontinued.’
‘There have been several attempts over the centuries to reinstate the Tournament,’ Dumbledore continued, ‘none of which have been very successful. However, our own Departments of International Magical Co-operation and Magical Games and Sports have decided the time is ripe for another attempt.’

- GoF 12