Willow Slough is a stream located in Mercer County, Illinois. It appears on the Toolesboro USGS 7.5-minute topographic quadrangle. The nearest populated place is Port Louisa, approximately 3.3 miles to the W.
Mercer County · Illinois
Willow Slough is a stream located in Mercer County, Illinois. It appears on the Toolesboro USGS 7.5-minute topographic quadrangle. The nearest populated place is Port Louisa, approximately 3.3 miles to the W.