There are so many races now that claim to be the toughest in the World. The MDS most notably claiming to be the toughest footrace in the World. But having just seen that thread for the Yukon Artic race, that looks completly bonkers.
Are there any other races out there that push even this?
Here's a selection of some that I've seen:
RAAM - Race across America on a bike, with strict time limits
Deca-Ironman - 10xIronman
Yukon - 300 mile footrace through the Artic
MDS - Stage race through Sahara desert
Trans Europe Footrace - Footrace from Lisbon to Moscow
Eco Challenge/Raid Galois (sp?) - Multiday adventure racing
Enduroman - Arch to Arc - Run to Dover, swim the channel, cycle to Paris
Which is the toughest, and are there more?