A trail doesn’t have to be full on DH to be ‘gnarly’. However even as an xc or pure trail centre rider, you’d find Haldon red and blue a bit tame. Definitely compared to anything in Wales. The so called black even more so. That said, if you’re used to the likes of Swinley in the SE then you’d probably find it more technical as it actually has rocks 😉
If you get there at a time when there will be no families on the blue, and blast it fast it’s actually quite fun despite all being smooth. Just nice and flowy. Combine blue to red in one and it makes it an okay length. The red is just over too quickly.
But yes, get off those trails and hit the cheeky stuff and the place becomes a lot more interesting. Not a massive amount of stuff, but some fun in there.
Elsewhere, there’s Woodbury Common down towards Exmouth. A lot of stuff there, but chances are you’ll get lost. Needs much exploring, a guide, or a decent route to follow. I followed this route last time – http://www.everytrail.com/view_trip.php?trip_id=1101382
ps watch out for and keep clear of the Marines. It’s MoD land, so usual rules apply. Stay out of their way and move on if asked.