Thanks for the nice comments about the trail. It makes the midge bits, back ache and blisters seem (almost) worthwhile !
The description given by other riders is fairly accurate - the route consists of 3 or 4 forest roads climbs with singletrack descents. The route is essentially 50% singletrack.
Much of the singletrack is 'natural' at the moment simply because are building the route in our spare time at weekends. Unlike Coed y Brenin which is worked on 7 days a week.
There are a number of changes upcoming to the route over the next few months most notably the introduction of some more built singletrack. With the introduction of the new sections the route will be 9.5 miles in length with 1700 feet of climbing.
If you wish to avoid the mud then I would try to avoid riding after wet weather - until it is all surfaced I'm afraid that some mud is inevitable.
As for the suggested diversion at the end, if you do ride it please, please, PLEASE keep your speed down. One of the reasons that we managed to sell the idea to the rangers at Afan was that we would be able to manage MTB'ers by directing them into areas where we wanted them.
Phil Lee
http://www.singletrack-mind.org.uk