Etta Reservoir   Be the first to submit input for Etta Reservoir. If you have info on Etta Reservoir, Carter County, Montana please submit it here to improve this web site.          These outdoors activities are available near Etta Reservoir.   Public Lands Near Etta Reservoir: Medicine Rocks State Park, Montana, 25 miles away Devils Tower National Monument, Devils Tower - WY, 64 miles away   Camp Grounds Near Etta Reservoir: Lantis Spring Campground, Carter County, 5 miles away   Ski Areas Near Etta Reservoir: Terry Peak, South Dakota, 70 miles away       1100 foot drop, 6 lifts, 24 runs