Gray Reef Reservoir   Be the first to submit input for Gray Reef Reservoir. If you have info on Gray Reef Reservoir, Granite Mountains, Natrona County, Wyoming please submit it here to improve this web site.          These outdoors activities are available near Gray Reef Reservoir.   Public Lands Near Gray Reef Reservoir: Seminoe State Park, Wyoming, 25 miles away Independence Rock State Park, Wyoming, 30 miles away Edness K. Wilkins State Park, Wyoming, 39 miles away   Marinas On or Near Gray Reef Reservoir: Alcova Lakeside Marina, Alcova, 2 miles away   Hotels Near Gray Reef Reservoir: Super 8 Casper/West, Casper, 26 miles away Hampton Inn Suites Casper, Casper, 29 miles away Best Western Ramkota Hotel, Casper, 29 miles away Quality Inn & Suites, Casper, 29 miles away La Quinta Inn Casper, Casper, 29 miles away   Whitewater Near Gray Reef Reservoir: North Platte River, NatronaCounty, 12 miles away       Class III-V+ - 5 miles long (Pathfinder Dam to Alcova Reservoir)