Lamar River

The Lamar River is a tributary of the Yellowstone River, approximately 40 miles (48 km) long, in northwestern Wyoming in the United States. The river is located entirely within Yellowstone National Park. Prior to the 1884-85 Geological Survey of the park, the Lamar was known as the East Fork of the Yellowstone River. During that survey, Geologist Arnold Hague named the river for L.Q.C. (Lucius Quinctius Cincinnatus) Lamar, then Secretary of the Interior (March 1885 - January 1888). The Lamar Valley, or the Secluded Valley of Trapper Osborne Russell and other park features or administrative names which contain Lamar are derived from this original naming. Osborne Russell in his 1921 Journal of a Trapper described the Lamar as...