Mahan and Hoyt Reservoir   Be the first to submit input for Mahan and Hoyt Reservoir. If you have info on Mahan and Hoyt Reservoir, Valley County, Montana please submit it here to improve this web site.          These outdoors activities are available near Mahan and Hoyt Reservoir.   Lakes Near Mahan and Hoyt Reservoir: Forsman Reservoir, Valley County, 19 miles away   Public Lands Near Mahan and Hoyt Reservoir: Hell Creek State Park, Montana, 28 miles away   Marinas On or Near Mahan and Hoyt Reservoir: Rock Creek Marina, Fort Peck, 19 miles away   Camp Grounds Near Mahan and Hoyt Reservoir: Trails West Campground, Valley County, 6 miles away Cottonwood Inn and RV Park, Glasgow, 8 miles away Shady Rest RV Park, Glasgow, 8 miles away