This is the newly redesigned Verderers trail final descent, Basically the guys over at the Forest of Dean have flattened out the large humps and made some nice flowing table tops on the 2 part of the final descent.
It really is worth a look, longer and faster than launchpad and more fun!
The verderers climb to the top should take you around 30 - 25minutes with a couple of breaks or you can push up in about 10-15 minutes.