Feedback on off-road cyclability.

Hi. I have  been using this excellent machine to plan gravel rides around West Somerset. Quite a few of the tracks are virtually uncycleable or uncyclable. Is there a way to grade these routes? Would anyone want to know what they are letting themselves in for? For example, Boarpath Lane that goes from Reston Lane to Broad Oak Hill is like the side of a quarry! Barely walkable. There are a few others I have found, one with huge railway sleeper size steps built into the “bridleway”. Max.