Fort Hall, established on the Snake River in southeastern Idaho in 1834 by Nathaniel Jarvis Wyeth, began as a fur-trading post in the old Oregon Country and soon became the leading trading center in the Snake River Valley. After Wyeth sold it to the Hudson’s Bay Company in 1837, its greatest importance emerged with westward migration. Following the Oregon Treaty of 1846, it became a crucial station on the Oregon Trail, where the Oregon, California, and Mormon routes shared a common path before dividing, and about 270,000 emigrants passed through. Its history also reflects longstanding Shoshone and Bannock homelands, imperial competition, and later overland transportation.