Doubtful Reservoir   Be the first to submit input for Doubtful Reservoir. If you have info on Doubtful Reservoir, Powder River County, Montana please submit it here to improve this web site.          These outdoors activities are available near Doubtful Reservoir.   Camp Grounds Near Doubtful Reservoir: Cow Creek Campground, Powder River County, 3 miles away   Hotels Near Doubtful Reservoir: Super 8 Colstrip, Colstrip, 39 miles away Lakeview Bed & Breakfast, Colstrip, 39 miles away   Ski Areas Near Doubtful Reservoir: Antelope Butte, Wyoming, 80 miles away       1000 foot drop, 3 lifts, 18 runs Big Horn, Wyoming, 91 miles away       800 foot drop, 3 lifts, 20 runs