Lamar River

Lamar River
The Lamar River in 1998 showing trees burned in the 1988 wildfires
Location
CountryUnited States
StateWyoming
Physical characteristics
Source 
  locationAbsaroka Range, Wyoming
  coordinates44°21′19″N 109°49′33″W / 44.35528°N 109.82583°W / 44.35528; -109.82583
MouthYellowstone River
  location
Tower Junction, Wyoming
  coordinates
44°55′45″N 110°24′07″W / 44.92917°N 110.40194°W / 44.92917; -110.40194
Length40 mi (64 km)
Discharge 
  locationTower Ranger Station
  average884 cu ft/s (25.0 m3/s)
Basin features
Tributaries 
  leftSoda Butte Creek
  rightSlough Creek

The Lamar River is a tributary of the Yellowstone River, approximately 40 miles (64 km) long, in northwestern Wyoming in the United States. The river is located entirely within Yellowstone National Park.