The Illinois Department of Natural Resources website has maps for state parks, separated into five regions. Individual site maps are available by clicking through to the desired park's page. Not all parks have site maps available online and the quality of maps varies.
In addition to over 60 state parks, Illinois has another 60 wildlife and natural areas. The National Park Service identifies Abraham Lincoln's home as Illinois' only national park, though three National Historic Trails run through the state. The National Park Service's website contains maps for these trails. Many state parks offer hunting and fishing activities; availability of activities varies by season.