Main Ash Reservoir   Be the first to submit input for Main Ash Reservoir. If you have info on Main Ash Reservoir, Powder River County, Montana please submit it here to improve this web site.          These outdoors activities are available near Main Ash Reservoir.   Camp Grounds Near Main Ash Reservoir: Red Shale Campground, Powder River County, 6 miles away   Hotels Near Main Ash Reservoir: Super 8 Colstrip, Colstrip, 36 miles away Lakeview Bed & Breakfast, Colstrip, 36 miles away Holiday Inn Express MILES CITY, Miles City, 40 miles away Comfort Inn Miles City, Miles City, 40 miles away Super 8 Miles City, Miles City, 40 miles away   Ski Areas Near Main Ash Reservoir: Antelope Butte, Wyoming, 91 miles away       1000 foot drop, 3 lifts, 18 runs