The facts don't look too re-assuring: 100miles. Arctic. Pulling a pulk. Sleeping outside. Average temperatures between -20 and -40 celcius (they stopped the race last time it got down to -60C, phew). But for some reason, those things just make it all the more appealing.
I'm under no illusions how hard this race is going to be. It's not a run around the Isle of Wight, or the London Marathon - this is going to be bloody hard work, bloody well enjoyable and frankly, I've trained bloody hard for it.
Judith and I debate how long I trained for the Sahara - I reckon it was 12 weeks but she maintains it was only 10. Either way, not as long as I should have done and I'm keen not to make the same mistake twice. This time I've put in the hours and miles to make sure I'm as fit as I can be when the race starts on 4 Feb.