Keelboat up the Missouri
The extent of the wanderings of this trio is not known. In the spring of 1807 Colter alone paddled a canoe down the Missouri to the mouth of the Platte where he found keelboats of the Missouri Fur Company of St. Louis, led by Manuel Lisa. He was promptly recruited and went with this expedition up the Missouri and the Yellowstone to the 14mouth of the Bighorn River, where Lisa built a log fort known as Fort Raymond or Manuel’s Fort.