Easter Great Plains has 4 regions with 5, 4, 4, 6 stations each.
See combined Topo Map.
Region 1: Chicago, Milwaukee, Green Bay, Rockford, Madison
41.81, -87.61 Chicago 43.05, -87.91 Milwaukee 44.5, -88.06 Green Bay 42.27, -89.12 Rockford 43.08, -89.38 Madison
Region 2: Decatur, Peoria, Springfield, St Louis
39.83, -88.98 Decatur 40.75, -89.58 Peoria 39.76, -89.61 Springfield 38.65, -90.25 St Louis
Region 3: Duluth, Minneapolis, Sioux Falls, Fargo
46.83, -92.11 Duluth 44.85, -93 Minneapolis 43.55, -96.71 Sioux Falls 46.88, -96.8 Fargo
Region 4: Rock Island, Dubuque, La Crosse, Waterloo, Des Moines, Lincoln
41.51, -90.61 Rock Island 42.5, -90.71 Dubuque 43.8, -91.23 La Crosse 42.5, -92.36 Waterloo 41.58, -93.61 Des Moines 40.81, -96.71 Lincoln