After hiding out in a beaver lodge for a few hours, Colter swam five miles downriver, only to find that his would-be killers were still looking for him, likely shocked that someone would be so crass as to lie about how fast he could run when faced with an unspeakably painful death. The only way out of the valley he was in was through a narrow pass that was probably being guarded. So he decided to do the last thing they would expect and climbed over a mountain (still naked, we have to assume). After scaling sheer cliffs by hand, he spent the night on top of the mountain in the snow before coming down the other side the next day.
After that, there was nothing left to do but walk. And walk and walk and walk and walk. After 11 days, he finally reached Fort Raymond. He was half-starved, his feet were torn and bloody and his limbs were swollen. All told, he had run, walked, climbed and swam 250 miles. After watching his good friend get murdered.
Immortalized by his home town in this incredibly disturbing graphic.
Suck it, Bear Grylls.