Lyons is a village in Cook County, Illinois, United States. Per the 2020 census, the population was 10,817. The Chicago Portage National Historic Site is located in Lyons.

Summit is a city in Cook County, Illinois, United States. The population was 11,161 at the 2020 census. The name Summit, in use since 1836, refers to the highest point on the Chicago Portage between t