Hugh Glass (c. 1780 - 1833) was an American fur trapper and frontiersman noted for his exploits in the American West during the first third of 19th century. A sailor, a reluctant pirate, an honorary Pawnee, and an explorer of the watershed of the Upper Missouri River in present day South Dakota and Montana, Glass was famed most of all for his legendary cross-country trek after being mauled by a grizzly bear. A 1971 movie entitled Man in the Wilderness, starring Richard Harris and John Huston, was loosely based on this story.
http://en.wikipedia.org/wiki/Hugh_Glass