Depends which way but the descent from the col to Kentmere is pretty techy through the switchbacks, then a lovely ribbon of singletrack all the way down.
Nan bield from the col to Haweswater is not one I’d recommend for intermediates, hike a bike up, rough rocky descent all the way. Was very tempted though.
I did an anti clockwise loop from Kentmere, Gatesgarth, Haweswater, Nan Bield hike, popped up to High Street (extra hour I guess) and back to Kentmere via Nan Bield. 4 and a half hours, 5200 feet of ascent, lots of hike a bike but a stunning 2100 foot descent with minimal pedalling to finish!