Have you heard of it.
Its barmy. Run through fire, under water, barbed wire, climb up and down hills. thousands enter, hundreds get hypothermia!
What about a T-Team from the US.
http://www.toughguy.co.uk/home.asp
You need to see it in film. about 5 k, but hell.
They do a summer version, but the winter one is more popular!?!