Yep I did it this year "when I was lost" ahem,Its best done from the Knott to Angle tarn,Depending on your choice of decent,Just after the Tarn keep on the higher path that heads around towards Place fell,when you get to roughly the number "5" at 567 on your map,Turn right off the track and follow the level path here, theres some exellent singletrack that heads around towards Bedafell and the long muddy/grassy decent to Dale Head.
This is probably a summer option as it gets very soft and wet up there!
the lower path to Boredale Hause is also great singletrack with a couple of interesting rocky outcrops. Enjoy
That's good, because in a genuine navigational error a couple of years back, we once overshot the bridleway from Boredale Haus down to Rooking and ended up riding down the footpath. Best trail I've ever ridden, and links in nicely if you take the above trails in the direction Gavgas recommends 😀