son (also known as Fort Manuel), it was the first such outpost in the upper Missouri region. Lisa assigned John Colter of his party to explore the region and trade with the nearby Blackfeet tribe. During his exploration, Colter became the first known European to visit what is now known as Yellowstone National Park; he reported on what was named the eponymous Colter's Hell. In July 1808, after a successful trading season, Lisa departed Fort Raymond, leaving behind a small party of men for the winter. While operations from the area were profitable for Lisa, the outpost suffered frequent attacks by the Blackfeet. During these years of Lisa's expeditions to the upper Missouri, his wife Polly and children stayed in St. Louis. Creation of the Missouri Fur Company Upon his return to St. Louis in August 1808, Lisa established the Missouri Fur Company (sometimes referred to as the St. Louis Missouri Fur Company), a joint venture with Jean Pierre Chouteau, Pierre Chouteau, Jr., William Clark, Andrew Henry, Francois Marie Benoit, and other prominent St. Louis fur traders. Jean Pierre Chouteau had also come from New Orleans, so the two men had ties to its French and Spanish Creole community. The company was created as a temporary trust by its founders, designed to either expire or reorganize after three years. In the spring of 1809, Lisa returned to Fort Raymond with a major expedition, made up of 350 men, about half of whom were Americans, the rest French Canadians and Creoles. They had 13 barges and keel-boats loaded with food, munitions, and articles suitable for the Indian trade, and the trip up the Missouri River was slow. Lisa transferred the fort's contents to the new company, and abandoned the isolated post. Directing the large force of men, Lisa built the first Fort Lisa (also called Fort Manuel) near what is now Bismarck, North Dakota. It was near a Gros Ventres village between the mouth of the Little Missouri and the Knife rivers. After the new fort was constructed, Lisa returned to St. Louis in October 1809. The next year, he ascended the river to Fort Lisa and conducted more trading operations. He returned to St. Louis in the autumn of 1810. In April 1811, Lisa began a final expedition of the Missouri Fur Company's first three years; he had two goals: to locate the then-lost fur trader Andrew Henry, and to