Pipeline Cowboy's original description: This is my first time placing a GeoCache, so I hope everyone enjoys it!
If you park at the Blue Ridge Tunnel West Trailhead parking area, you will have your best chance of finding it. When you reach the Dr. Robert Sumter Griffith information stand, you haven't gone quite far enough. If you reach the Mile Marker 1.50, you've gone too far.
Enjoy and don't forget to check out the Tunnel while you're there!
Update from Elliotts4: A hint and a spoiler image were added on August 22, 2024. There's a lot to search here and potentially high muggle traffic.