A short section of trail running between Panther Run Trail
(Trail Marker #17) and Route 322 (Trail Marker #19). The southern half has some rocky sections; the north half is fairly smooth.
From the pipeline, look for the blue blazes: there's an ATV trail sharing the first 100' and it's easy to miss the proper path through the woods.
Once you reach 322, cross the road and continue down Spruce Hill Road a short distance to pick up Coupler Run Loop
: it starts at the first dirt road on the right.
As of 2014, this section isn't regularly maintained and there's no bridge over Panther Run.