Well, I'm still trying to find local off road routes, so I thought I'd give the
Preston Guild Wheel a go for the first time:-
https://www.strava.com/activities/712982247/overview
Time lapse of the route:-
Really enjoyed it. I wouldn't say it's really off road - it's probably 50% tarmac, paths, 30% gravel tracks, 15% pavement/cycle paths and 5% quiet roads. There is a steep section above Brockholes though and the part prior (iff going clockwise) is nice up and down gravel paths.
Overall, I'd highly recommend the route to anyone in the area (it's really easy to follow and well signposted - more so if going clockwise) and easy parking in the Broughton area.