Youghiogheny - 2. Top - Swallow Falls Rd. (Bridge above Swallow Falls [State Park]) to Hoyes Run. (MD)
Eddy hop down the left. Don't go into the sieve on the right, just below the big rock at the top that hides most of the rapid. This sieve has swallowed numerous boats over the years. It's especially dangerous when it's not jammed full of logs, bottles, tires, woodchucks, and other debris.
Lat/longitude coordinates are an educated SWAG, from Google Satellite Map.