The Rivers of Lewis and Clark
The Missouri River headwaters are the
Gallatin, Madison, and Jefferson Rivers
in Montana and flow into the Mississippi
River at St. Louis.
DID YOU KNOW? The
Missouri River is
the longest river in the United States
at 2,540 miles. The Mississippi River
is second at 2,340 miles.
The Salmon River: The Salmon River, dubbed the "River of No
Return", remains one of the few remaining free-flowing waterways
in America and flows for 425 miles from the headwaters in
central and eastern Idaho mountains. Salmon
River Reconnaissance by Captain Clark on August 19, 1805
The Clearwater River & Lochsa
River: Flows along US highway 12. The
Lolo Trail, route traveled by
Lewis and Clark in 1805 & 1806,
parallels Highway 12 along the upper ridges.
The Snake River: 1,040 miles long, chief tributary of the
Columbia River. Was named Lewis' River on
View map >>
The Columbia River: Flows for more than 1,200 miles,
from the base of the Canadian Rockies in southeastern
British Columbia to the Pacific Ocean at Astoria, Oregon,
and Ilwaco, Washington. On October 16, 1805, Lewis and
Clark entered the waters of the Columbia.
The Yellowstone River: The longest undammed river in the
contiguous United States, retains most of its natural habitat
characteristics and flows. 554 miles long from the Wyoming
boundary to the North Dakota boundary. William Clark
explored the Yellowstone in 1806.
Lewis N Clark Uncharted Duffel Bag