Lamar River River Levels

Last Updated: March 30, 2026

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 .




15-Day Weather Outlook


       
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
1320 cfs 2.66 ft 0
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.