After a couple of days you acclimatize yourself, you'll start the trek on Day Three, walking through the enormous Katiba forest which will take the whole of the day.
Earlier this year, British explorer Pen Huddle and his team trekked for three months across the frozen Arctic Ocean, taking measurements and recording observations about the ice.
It's the key to whether individual farmers can provide for their families, face unemployment and ultimately whether whole communities stay on the land or trek to the cities.
And — if you were among the later settlers that set off — you were following in the footsteps of thousands of other people and animals… and trekking through all the waste they left in their wake.
Desperately hungry after months without food, she's carefully monitoring her cubs to determine when they'll be ready for a marathon 50-mile trek to the bay where she can finally hunt for food again.