Montana's greatest wonder: the Missouri River

On June 16, 1805, Captain Clark of the Corps of Discovery – with an extremely ill Sacajawea accompanying him – halted below the confluence of Belt Creek and the Missouri River ("portage creek," to the Corps), setting up what would become the base camp for their month-long assault around the "great falls." As part of Meriwether Lewis's effort to cure the young mother, he used the water of a sulphur spring that is located across the Missouri from the mouth of Belt Creek and called Sacajawea or Sulphur springs. The actual area of the Lower Portage Camp may be glimpsed looking downriver from Sulph...