\the end of this route (as depicted) actually joins up with the route that runs from the Sound Mirror to the West that ends up on the canal, (locally called the Roller Coaster).  It also joins to the footpath to the east which goes all the way to the top of Mill Fields Road.  It is well established and I personally (along with many others) have been using it for over 20 years.  Many use this track as the Boundary Stone walk.