Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Lamar River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Lamar River, the highest being situated at an altitude of ft, the .

The Lamar River is a tributary of the Yellowstone River that flows through the northwestern part of Wyoming, USA. It is approximately 40 miles long and is known for its scenic beauty and wildlife. The river was named after Lucius Quintus Cincinnatus Lamar, a former Secretary of the Interior. The river is fed by several small streams and springs and its water is relatively clear and cold throughout the year. There are no reservoirs or dams on the Lamar River, and it is primarily used for recreational activities such as fishing, hiking, and camping. The river also supports local agriculture through irrigation of nearby farms and ranches. The Lamar River is an important part of the Yellowstone National Park ecosystem, providing habitat for a variety of fish and wildlife species, including cutthroat trout, grizzly bears, and bison.