Jack Downs Reservoir   Be the first to submit input for Jack Downs Reservoir. If you have info on Jack Downs Reservoir, Dawson County, Montana please submit it here to improve this web site.          These outdoors activities are available near Jack Downs Reservoir.   Public Lands Near Jack Downs Reservoir: Makoshika State Park, Montana, 31 miles away   Hotels Near Jack Downs Reservoir: Knights Inn Glendive, Glendive, 29 miles away Comfort Inn Glendive, Glendive, 29 miles away Days Inn Glendive, Glendive, 29 miles away Super 8 Glendive, Glendive, 29 miles away