USA HISTORY

“ ____ at the distance of 4 miles further the road took us to the most distant fountain of the waters of the mighty Missouri in such of which we have spent so many toilsome days ____ After refreshing ourselves we proceeded on to the top of the dividing ridge from which I discovered immense ranges of high mountains still to the West of us with their tops partially covered with snow.”-At Lemhi Pass, Monday, August 12, 1805The physical geographic features described posed a problem while exploring lands contained in-