Duncan Lake   Be the first to submit input for Duncan Lake. If you have info on Duncan Lake, Ozarks, Warren County, Missouri please submit it here to improve this web site.          These outdoors activities are available near Duncan Lake.   Lakes Near Duncan Lake: Washington Lions Lake, Franklin County, 11 miles away Harry Sammons Lake, Gasconade County, 18 miles away   Public Lands Near Duncan Lake: Meramec State Park, Missouri, 20 miles away Robertsville State Park, Missouri, 27 miles away Cuivre River State Park, Missouri, 30 miles away   Hotels Near Duncan Lake: Miller's Landing Bed & Breakfa, New Haven, 4 miles away Americas Best Value Inn, Warrenton, 9 miles away Holiday Inn Express Warrenton, Warrenton, 9 miles away The Hiding Place Bed and Break, Warrenton, 9 miles away Baymont - Warrenton, MO, Warrenton, 10 miles away   Ski Areas Near Duncan Lake: Hidden Valley, Missouri, 37 miles away       250 foot drop, 6 lifts, 9 runs