Patagonian Expedition Race and that put my 25 minutes in perspective.
The "Last Wild Race" as it is also known, involves competing teams of four biking, orienteering and kayaking their way across remote parts of Patagonia including Tierra del Fuego and the Strait of Magellan. Each year's course is different and no GPS is allowed, just old fashioned compass and map reading.
Over around 10 days they will navigate across between 500 and 1000 km of incredibly beautiful yet hard landscapes.
There is a wicked part of me that thinks "Across the Andes by Frog" but that's probably because I'm jealous of the experiences they will have - if, that is, they finish it, as the drop out rate is around a third.
Anyway, good luck to the British teams and in particular Nick Gracie who is looking for his fourth victory!
Map of 2012 route: from Patagonian Expedition Race