Fairview Montana For a look at our COMPREHENSIVE COMMUNITY PROFILE! LEWIS AND CLARK SLEPT HERE, TWICE! April 27, 1805-The Corps of Discovery left their campsite where Fort Union is now located and followed the Missouri River into what is now MONTANA They camped that night across the river from what is now the community of Nohly August 5, 1806- They arrived at the mouth of the Yellowstone at 4pm ...