September 8, 1805
Mountains to the left and right

The expedition proceeds north through the Bitterroot valley with the snow-capped Bitterroot Mountains to the west and the mostly barren Sapphire mountains to the east. They find two Indian horses and a colt. They also find a new pest—brittle prickly pears.
In St. Louis, the Governor of Upper St. Louis, James Wilkinson, plans expeditions to the Yellowstone River and Sante Fe.
At Monticello in Virginia, President Jefferson writes about the mineral specimens that Lewis sent from Fort Mandan.

























