Monumental Reservoir   Be the first to submit input for Monumental Reservoir. If you have info on Monumental Reservoir, Lincoln County, Nevada please submit it here to improve this web site.          These outdoors activities are available near Monumental Reservoir.   Public Lands Near Monumental Reservoir: Spring Valley State Park, Nevada, 14 miles away Cathedral Gorge State Park, Nevada, 31 miles away Beaver Dam State Park, Nevada, 39 miles away Great Basin National Park, Baker - NV, 40 miles away