The post was established by the
mountain man Jim Bridger, after whom it is named, and
Louis Vasquez. In December 1843, Bridger wrote to
Pierre Chouteau Jr., "I have established a small fort, with a blacksmith shop and a supply of iron in the road of emigrants on Black Fork of Green River, which promises fairly." According to
Stanley Vestal, "His fort consisted simply of an eight-foot stockade, with a corral adjoining on the north. Within that stockade stood four log cabins with flat dirt roofs. One of these housed Bridger's forge and carpenter's bench, another his store, the third his family and possibles, while the fourth was the home of his partner." On October 19, 1852, Mrs.
Benjamin G. Ferris visited with her husband, and described the fort as "- a long, low, strongly-constructed log building, surrounded by a high wall of logs, stuck endwise in the ground." On March 9, 1854, Bridger filed a claim with the
United States General Land Office, for the around the fort.
Richard Francis Burton visited the fort in August 1860, and later wrote, "Colonel Bridger, when an Indian trader, placed this post upon a kind of neutral ground between the Snakes and the Crows (Hapsaroke) on the north, the Oglalas and other Sioux to the east, the Arapahoes and Cheyennes on the south, and various tribes of Yutas (Utahs) on the southwest." In 1845,
Lansford Hastings published a guide entitled ''The Emigrant's Guide to Oregon and California'', which advised California emigrants to leave the
Oregon Trail at Fort Bridger, pass through the
Wasatch Range across the
Great Salt Lake Desert (an 80-mile waterless drive), loop around the
Ruby Mountains, and rejoin the California Trail about seven miles west of modern
Elko, Nevada (now
Emigrant Pass). The ill-fated
Donner-Reed Party followed that route, along which they were met by a rider sent by Hastings to deliver letters to traveling emigrants. On July 12, the Donners and Reeds were given one of these letters, in which among other messages, Hastings claimed to have "worked out a new and better road to California", and said he would be waiting at Fort Bridger to guide the emigrants along the new cutoff. ==Mormons and Fort Supply==