Flat Lake   Be the first to submit input for Flat Lake. If you have info on Flat Lake, Concordia Parish, Louisiana please submit it here to improve this web site.          These outdoors activities are available near Flat Lake.   Lakes Near Flat Lake: Lac a Madame Lee, Avoyelles Parish, 15 miles away   Hotels Near Flat Lake: Hampton Inn and Suites Marksville, LA, Mansura, 25 miles away BEST WESTERN St. Francisville Hotel, Saint Francisville, 28 miles away Oak Tree Inn Livonia, Livonia, 31 miles away Days Inn Natchez, Natchez, 35 miles away Passport Inn & Suites Natchez, Natchez, 36 miles away