Fort Raymond or alternatively Manuel's Fort or Fort Manuel, was an outpost established by fur trader Manuel Lisa and was named after his son. The post was located at the confluence of the Bighorn and the Yellowstone Rivers. Upon its foundation it was the first trading post maintained by European descendants in the modern state of Montana. It would be the first of several posts by Lisa over his time in the developing regional fur trade. Among those hired by Lisa for the expedition were several members of the Corps of Discovery at Fort Raymond, notably George Drouillard, John Colter and Peter M. Weiser, who were stationed at Fort Raymond.