Gantz Reservoir   Be the first to submit input for Gantz Reservoir. If you have info on Gantz Reservoir, Natrona County, Wyoming please submit it here to improve this web site.          These outdoors activities are available near Gantz Reservoir.   Public Lands Near Gantz Reservoir: Independence Rock State Park, Wyoming, 40 miles away   Campgrounds Near Gantz Reservoir: Hell's Half Acre Motel and Cafe, Powder River, 15 miles away   Whitewater Near Gantz Reservoir: Powder River - Middle Fork, Washakie JohnsonCounty, 15 miles away       Class II-V - 12 miles long (Forest Service Road bridge Close to county line to Highway 190)