Castle Rock Lake   Be the first to submit input for Castle Rock Lake. If you have info on Castle Rock Lake, Rosebud County, Montana please submit it here to improve this web site.          These outdoors activities are available near Castle Rock Lake.   Public Lands Near Castle Rock Lake: Rosebud Battlefield State Park, Montana, 38 miles away Tongue River Reservoir State Park, Montana, 38 miles away Little Bighorn Battlefield National Monument, Crow Agency - MT, 59 miles away   Hotels Near Castle Rock Lake: Super 8 Colstrip, Colstrip, 1 miles away Lakeview Bed & Breakfast, Colstrip, 1 miles away   Ski Areas Near Castle Rock Lake: Antelope Butte, Wyoming, 68 miles away       1000 foot drop, 3 lifts, 18 runs Big Horn, Wyoming, 92 miles away       800 foot drop, 3 lifts, 20 runs