 In October 1808 Colter set out to trap with another member of Lisas  company, John Potts. Foolishly, they returned to the Three Forks  area, where they were able to amass almost a ton of fur. However, at  Jefferson Fork they were attacked by Blackfeet who shot and killed  Potts and took the furs. Colter was captured and given a chance to  live. He was stripped naked and given 30 seconds headstart to run  for his life. Colter outran all of them except for one. When they  were the only two left, Colter turned upon him and killed the man  with his own spear. Colter ran for five miles across a rocky plain  between the Jefferson and Madison Forks. Once he reached the Madison  River, he dived under a mass of logs and beaver lodges and hid in an  air pocket in the icy water until nightfall. He went six miles  downstream and climbed up a sheer cliff. He walked, still without  any clothes, the 250 miles to Fort Raymond, where he arrived after  11 days.