Just back from a week in the Lakes taking in as many descents as we could:
+1 for Grizedale Tarn to Patterdale (though I havent done other Helvellyn descents). As good a piece of techie singletrack as I’ve ridden anywhere.
Shame about the Dollywagon to Grizedale Tarn section above, unless you have the trials skills required for the drainage ditches you’ll find it frustrating.
+1 for the various Grizedale Forest descents too – several are really excellent and easily linked up with bridleways and TNF trail. Fox, Breasty Haw, Riverbed, Parkamoor (as above) etc
Watendlath to Rosthaite (stating the bleeding obvious I know).
Jenkins Crag is a bit short, but will make you smile.
Garburn Pass – a bit samey and loose for me, but good fun.
Long Heights to Colthouse (Claife Heights) turned out to be good too – fast and open, not techie, but quick.
Seldom Seen trail in Whinlatter is worth a ride if you’re at the trail centre.
Non-Lakes…
I’d also add Limestone Link on the Mendips – Beacon Batch trig point to the A38 near Churchill – sounds unlikely, but it really is good (and about 3 miles pretty much continuous downhill – not bad for the outskirts of Bristol.
+ Too many in Porlock / Horner Woods to mention – but they obviously dont have the length of the Lakes runs.