Upper Flat Lake   Be the first to submit input for Upper Flat Lake. If you have info on Upper Flat Lake, Jersey County, Illinois please submit it here to improve this web site.          These outdoors activities are available near Upper Flat Lake.   Lakes Near Upper Flat Lake: Clear Lake, Lincoln County, 9 miles away   Public Lands Near Upper Flat Lake: Castlewood State Park, Missouri, 24 miles away Cuivre River State Park, Missouri, 26 miles away Route 66 State Park, Missouri, 26 miles away   Marinas On or Near Upper Flat Lake: Winneberg Marina, Golden Eagle, 5 miles away Allan Joseph Marine, Golden Eagle, 5 miles away Eagles Landing Marina, Saint Charles, 7 miles away Gibson Marina, Saint Charles, 7 miles away Woodland Marina, Saint Charles, 7 miles away   Hotels Near Upper Flat Lake: Sleep Inn Saint Charles, Saint Charles, 10 miles away Holiday Inn Express Hotel & Suites ST CHARLES, Saint Charles, 11 miles away Garden Plaza St Louis West St Peters, Saint Peters, 11 miles away Country Inn & Suites By Carlson, St, Peters, MO, Saint Peters, 12 miles away Hampton Inn St LouisSt Charles, Saint Charles, 12 miles away   Ski Areas Near Upper Flat Lake: Hidden Valley, Missouri, 26 miles away       250 foot drop, 6 lifts, 9 runs   Whitewater Near Upper Flat Lake: Whitewater Outfitter - Raging Rivers Water Park, JerseyCounty, 11 miles away       Whitewater outfitter