I don’t think any map of Swinley lists all the bits – there’s an incredible network of trails there, some of which may be off limits due to logging, a race in progress or just too waterlogged to bother with, others which will be fantastic.
There’s two main man made bits: The Gully (short jumpy section) and another section (don’t know the name sorry) which has a really nice flowy downhill/jumpy section and some tight twisting singletrack.
Map here:
http://www.gorrick.com/downloads/swinleyforestmap.pdf but neither area is specifically named other than the “expert mtb area”. The Gully by the way is somewhere in the region of point 3 or 4 on that map.