Ontonagon River River Levels

Last Updated: December 4, 2025

The Ontonagon River is a 114-mile-long river located in the Upper Peninsula of Michigan.


Summary

Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Ontonagon River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Ontonagon 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
Ontonagon River Near Rockland
USGS 04040000
1100 cfs 6.24 ft 80.62
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Ontonagon River ( ON-tə-NAH-gən) is a river flowing to Lake Superior on the western Upper Peninsula of Michigan in the United States. The main stem of the river is 25 miles (40 km) long and is formed by a confluence of several longer branches, portions of which have been collectively designated as a National Wild and Scenic River. Several waterfalls occur on the river including Agate Falls and Bond Falls.