Pecatonica

The Pecatonica River rises in the hills west of the upper Rock River and winds south and east through prairie and woodland before joining it. Its name is derived from Algonquian words meaning slow water. During the Black Hawk War of 1832, an encounter at Horseshoe Bend on the Pecatonica became known as the Battle of the Pecatonica. Militiamen attacked a group of Kickapoo there on 16 June, amid the fighting that spread across the Rock River country.