Needles Highway Custer SD – September 2021 Sylvan Lake Needles Highway is an incredible road – hairpin turns, dramatic granite formations, tremendous overlooks. This highway is not very long, but the tight turns and awesome sights are worth the slow driving! These granite towers are on both sides of the road, sometimes just one side with views of the Black Hills on the other side. Driving through the “Eye of the Needle”, a tunnel through the granite. Very tight for larger vehicles. Mary Jean was here as a child. We have a picture of her at this tunnel from 1954. The Black Hills Cathedral Spires This was the inspiration for Mt. Rushmore.