Upper Mason Lake   Be the first to submit input for Upper Mason Lake. If you have info on Upper Mason Lake, Madison County, Montana please submit it here to improve this web site.          These outdoors activities are available near Upper Mason Lake.   Public Lands Near Upper Mason Lake: Lewis and Clark Caverns State Park, Montana, 12 miles away Beaverhead Rock State Park, Montana, 34 miles away Missouri Headwaters State Park, Montana, 38 miles away   Camp Grounds Near Upper Mason Lake: Potosi Campground, Madison County, 6 miles away Balanced Rock Campground, Madison County, 7 miles away Mill Creek Campground, Madison County, 8 miles away   Hotels Near Upper Mason Lake: Super 8 Whitehall, Whitehall, 14 miles away Sacajawea Hotel, Three Forks, 33 miles away Copper King Hotel and Conventi, Butte, 39 miles away Holiday Inn Express BUTTE (PARKSIDE), Butte, 39 miles away Hampton Inn Butte, Butte, 39 miles away   Ski Areas Near Upper Mason Lake: Moonlight Basin, Montana, 41 miles away       4166 foot drop, 7 lifts, 97 runs Big Sky, Montana, 44 miles away       4350 foot drop, 17 lifts, 150 runs Great Divide, Montana, 59 miles away       1503 foot drop, 6 lifts, 140 runs