Dunning Reservoir   Be the first to submit input for Dunning Reservoir. If you have info on Dunning Reservoir, Powder River County, Montana please submit it here to improve this web site.          These outdoors activities are available near Dunning Reservoir.   Camp Grounds Near Dunning Reservoir: Cow Creek Campground, Powder River County, 5 miles away   Hotels Near Dunning Reservoir: Super 8 Colstrip, Colstrip, 40 miles away Lakeview Bed & Breakfast, Colstrip, 40 miles away   Ski Areas Near Dunning Reservoir: Antelope Butte, Wyoming, 82 miles away       1000 foot drop, 3 lifts, 18 runs Big Horn, Wyoming, 93 miles away       800 foot drop, 3 lifts, 20 runs