The Watonwan River in Garden City in 2007 |- left||North Fork
Watonwan River| |- right||South Fork Watonwan River| |-
location||Amboy Township, Cottonwood County| |- elevation||1,529
ft (466 m) | |Mouth||Blue Earth River| |- location||Rapidan
Township, Blue Earth County| |- elevation||879 ft (268 m) |
|Length||113.2 mi (182 km) | |Basin||878 sq mi (2,274 km2) |
|Discharge||for near Garden City| |- average||391 cu ft/s (11
m3/s) | |- max||13,900 cu ft/s (394 m3/s)| |- min||1.8 cu ft/s
(0 m3/s)| The Watonwan River is a tributary of the Blue Earth
River, 113 miles (182 km) long, in southern Minnesota in the
United States. Via the Blue Earth and Minnesota Rivers, it is
part of the watershed of the Mississippi River, draining an area
of 878 square miles (2,274 km²) in an agricultural region. The
Watonwan drains about a quarter of the Blue Earth River's
watershed. The Watonwan River rises in Amboy Township,
approximately three miles (5 km) southwest of Jeffers in central
Cottonwood County, and flows generally eastw