Jade Reservoir   Be the first to submit input for Jade Reservoir. If you have info on Jade Reservoir, Garfield County, Montana please submit it here to improve this web site.          These outdoors activities are available near Jade Reservoir.   Public Lands Near Jade Reservoir: Hell Creek State Park, Montana, 8 miles away   Marinas On or Near Jade Reservoir: Hell Creek Marina, Jordan, 6 miles away