River - Sangamon
The Sangamon River, a tributary of the Illinois River, is located in central Illinois. It is 246 miles in length and has a drainage area of approximately 5,370 square miles. Its major tributaries include Salt Creek, South Fork and Sugar Creek. The headwaters of the Sangamon are located in McLean County. The river flows past the cities of Mahomet, Monticello, Decatur and Springfield before joining the Illinois River at Beardstown.