Biggs, Thomas, mountain man (c. 1812-post 1855). Born in Pennsylvania, he reached the Rockies by 1834, trapping with Jim Bridger and others, and in 1837 was working for the American Fur Company. He earned the respect of Osborne Russell and other highly competent mountain men. Biggs became a trader in Brown's Hole, Colorado, in 1839, but quitted the mountains for Taos in 1842; he joined St. Vrain's volunteers to quell the 1847 uprising. Biggs lived at various places in New Mexico and had moved to Salt Lake City by 1855.