Thornapple River River Levels

Last Updated: February 19, 2026

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 .




15-Day Weather Outlook


       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Thornapple River Near Hastings
USGS 04117500
564 cfs 4.17 ft 55.37
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.