Illinois Atlas & Gazetteer by DeLorme
This atlas of Illinois is a great resource with roads, towns, counties and contour lines. The accompanying gazetteer is an extensive and thorough list providing helpful information such as camping locations, scenic attractions, unique natural features, bike rides, hiking, boat launches, historic sites, museums, attractions and more. Each noted feature is cross-referenced on the map pages with easy to spot bold symbols making the location of the desired feature very easy to find.
The ILLINOIS State atlas is done at a scale of 1:150,000 which equates to 1" = 2.4 miles. The topographic contour interval is 30 Feet. There are 81 map pages, and 96 total pages in this informative recreation atlas.