Monongahela National Forest (West Virginia) The sky clears just in time for a spectacular sunset over Spruce Knob Lake Milky Way over Spruce Knob Lake. Located deep in the mountains, the Allegheny Highlands boast some of the darkest skies in the Eastern US Spruce Forest on West Viriginia’s Highest Mountain (Spruce Knob). Share this:Click to share on Facebook (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Twitter (Opens in new window)Like this:Like Loading...