Fort Laramie National Historic Site

Fort Laramie was a significant 19th-century trading post, diplomatic site, and military installation located at the confluence of the Laramie and the North Platte Rivers. They joined in the upper Platte River Valley in the eastern part of the present-day U.S. state of Wyoming. The fort was founded as a private trading-post in the 1830s to service the overland fur trade; in 1849, it was purchased by the United States Army. The site was located east of the long climb leading to the best and lowest crossing-point over the Rocky Mountains at South Pass and became a popular stopping-point for migrants on the Oregon Trail. Along with Bent's Fort on the Arkansas River, the trading post and its supporting industries and businesses were the most significant economic hub of commerce in the region.

Fort William was founded by William Sublette and his partner Robert Campbell in 1834. In the spring of 1835, Sublette sold the fort to Thomas Fitzpatrick, a local fur trader.