Lamar River River Levels

Last Updated: December 4, 2025

The Lamar River is a tributary of the Yellowstone River that flows through the northwestern part of Wyoming, USA.


Summary

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 .

       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Lamar River Nr Tower Falls Ranger Station Ynp
USGS 06188000
276 cfs 1.17 ft 22.12
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

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.