 South of Peoria, the Illinois River goes by East Peoria and Creve Coeur and then Pekin in Tazewell County.It is then joined by the Mackinaw River and then passes through the Chautauqua National Wildlife Refuge.Across from Havana, the Illinois is joined by the Spoon River coming from Fulton County and across from Browning, it is joined by the Sangamon River, which passes through the state capital, Springfield, Illinois.