On June 13, 1805 they reached the Great Falls of the Missouri River and for some reason were forced to stay in this region for at least one month yet possibly as long as two months. They only needed to walk the 15 miles to avoid the waterfalls yet something is off. Lewis & Clark's Expedition was about the Louisiana Purchase and origins or headwaters of Mississippi River which is located in southwest Montana. They had to find Mississippi Rivers source as a result of the Louisiana Purchase. It's located near Wisdom,Montana where Big Hole (Whole or Entire) River is located. They brought along Sacagawea or Sacajawea, who became a burden. Toussaint Charbonneau bought the young girl aged 13. This video documentary details an alternate version of what possibly happened in June, July, August and September of 1805.