If you want hills I can suggest some.
I ride a road bike round Tarleton, Croston neck of the woods so can suggest quiet roads if that’s any help? You can get from Tarleton to Sollom and on to Bretherton via tarmac covered farm tracks that are traffic free but I don’t know a way from Bretherton to Wigan without going on road.
From Haigh getting to leigh is easy and completely off road, you can get onto the canal bank at Red rock and head toward Rabbit rocks, via Haigh hall or not, then Amberswood then Bickershaw country park then your pretty much at Penny flash.
If you want something quicker, all be it more boring, you can follow the canal down to Wigan from Red rock and then head from Wigan past Scotsman flash and onto Penny flash.