McWilliams Reservoir   Be the first to submit input for McWilliams Reservoir. If you have info on McWilliams Reservoir, Garfield County, Montana please submit it here to improve this web site.          These outdoors activities are available near McWilliams Reservoir.   Hotels Near McWilliams Reservoir: Best Western War Bonnet Inn, Miles City, 49 miles away Econo Lodge Miles City, Miles City, 49 miles away Comfort Inn Miles City, Miles City, 49 miles away Super 8 Miles City, Miles City, 49 miles away Holiday Inn Express MILES CITY, Miles City, 49 miles away