Thornapple River River Levels

Last Updated: December 4, 2025

The Thornapple River is a 100-mile-long river located in Michigan, United States.


Summary

Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Thornapple River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Thornapple 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
Thornapple River Near Hastings
USGS 04117500
150 cfs 3.13 ft -1.96
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Thornapple River (GNIS ID #1075813) is an 88.1-mile-long (141.8 km) tributary of Michigan's longest river, the Grand River. The Thornapple rises in Eaton County, Michigan and drains a primarily rural farming area in Central Michigan. It joins the Grand in Ada, Michigan, 10 miles (16 km) east of Grand Rapids.