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Lamar River

River in Yellowstone NP, Rocky Mountains in WY

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Length

48mi

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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.

Scenic Photographs

Headwaters of the Lamar River

Headwaters of Lamar River, Jacob W. Frank (NPS) photograph above.

Yellowstone Flood of 2022

From June 10th to June 13th, heavy rain and melting snowcaps caused massive flooding in the north area of the park.

Lamar River above the Confluence with the Yellowstone River on June 13, 2022, Jacob W. Frank (NPS) two photographs above.

Lamar River Canyon at high water on June 13, 2022, Chase Tedder (NPS) photograph above.

Lamar River near the Buffalo Ranch at high water on June 13, 2022, Jacob W. Frank (NPS) photograph above.

Swollen Lamar River and Lamar Valley on July 8, 2022, Jacob W. Frank (NPS) photograph above.

Yellowstone flood event 2022: Lamar River and Lamar Valley post spring flood (taken September 1), Jacob W. Frank (NPS) photograph above.

Yellowstone flood event 2022: Lamar River above the confluence with the Yellowstone River post spring flood (taken September 1), Jacob W. Frank (NPS) two photographs above.