Along the Missouri River
On the way west the expedition towed, poled, and rowed their boats up the Missouri River, against the current, on a good day making 20 miles
After more than a year on the Missouri, Meriwether Lewis found its source, a spring in the Rocky Mountains. Thus far I had accomplished one of those objects on which my mind has been unalterably fixed for many years, he wrote, judge then of the pleasure I felt in allying my thirst with this pure and ice-cold water.
Photograph by Lisa Truitt