What are the UKs toughest trails?

bluechair84
bluechair84 Posts: 4,352
edited February 2012 in MTB general
Common then guys and gals, get your thinking cap on. What trails do we know of that can be really labelled as 'gnarly'? Mountains aren't common for us so this is about techy features, super hard descents that aren't proper DH (so doesn't rely on gaps, kickers and drops) and with some climbing to access them.

I'm thinking;
# Jacobs ladder for being steep and rocky
# The boulder fields around the Standedge trail between Huddersfield and Ripponden (get your trackstand ready)
# The Snowdon ascent and descent - i'd like to say Rangers path but I've only ridden / walked pyg track and Llanberis way.
#Glencoe national DH circuit. There's virtually no jumps, gaps or drops so I think it could pass as a trail, but the technicality of the course is unlike anything else. Super tough.

So, what else do you think could be the bench marks for the most technical terrain we can ride?