White Rock Reservoir   Be the first to submit input for White Rock Reservoir. If you have info on White Rock Reservoir, Natrona County, Wyoming please submit it here to improve this web site.          These outdoors activities are available near White Rock Reservoir.   Whitewater Near White Rock Reservoir: Powder River - Middle Fork, Washakie JohnsonCounty, 19 miles away       Class II-V - 12 miles long (Forest Service Road bridge Close to county line to Highway 190)