Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Grant River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Grant River, the highest being situated at an altitude of ft, the .

The Grant River is a 46-mile-long tributary of the Mississippi River located in southwestern Wisconsin. It was named after President Ulysses S. Grant who lived in nearby Galena, Illinois. The river is fed by several small streams and flows through rugged terrain, creating scenic bluffs and valleys. The hydrology of the river is influenced by the surrounding karst topography, resulting in cool and clear water that supports a diverse fish population. There are several small reservoirs and dams along the river, including the Potosi/Wisconsin River Reservoir and the Grant River Dam. These structures provide flood control, water storage, and hydroelectric power. The river also supports agricultural activities, including crop irrigation and livestock watering. Recreational opportunities include fishing, boating, and hiking along the river's scenic bluffs.