one of my fave grizedale rides is the following:
start at Visiotr Center
Dads
Grandads
Dentist
Breasty Haws to Great Wood
Devils Gallop
back to VC
new black section for a play
lawson park
riverbed descent
either finish or play on new black section some more.
you can also add Parkamoor to Nibthwaite and the bridal way over to ickenthwaite in that aswell.
you can ride all day in the forest 😀 use the fireroads or bits of the north face to get to the good stuff.