Across the street from the New River Campground on US 60 between Gauley Bridge and Cathedral Falls, is Hidden Falls on Laurel Branch.  You will see a short section of guard rail on the north side of the road and a culvert in the middle of it.  Looks like this.  (38.158658, -81.187156)  There's a small shopping center with a CVS and a Foodland just before the campground entrance.

HiddenFalls1

HiddenFalls

 

Go up at the guard rail, over the tracks above and into the woods.  You can't miss it.  It's only a few feet.