Longridge Fell is about 45 miles if you take the directish route, which is a lot of canals and bike paths through Bolton and Blackburn, I'm guessing wild camping would be fine near the tree line somewhere and apparently the views are amazing on a clear day, can see the sea, Wales and a bunch of other stuff. I'd planned a longer, hillier route round the side to get there when we stayed at Gaddan's but massive headwinds and fitting it in after work meant we couldn't get there before dark. Canal blast to Todmorden and across would probably be alright too for a different route there/back.
Longridge Fell is about 45 miles if you take the directish route, which is a lot of canals and bike paths through Bolton and Blackburn, I'm guessing wild camping would be fine near the tree line somewhere and apparently the views are amazing on a clear day, can see the sea, Wales and a bunch of other stuff. I'd planned a longer, hillier route round the side to get there when we stayed at Gaddan's but massive headwinds and fitting it in after work meant we couldn't get there before dark. Canal blast to Todmorden and across would probably be alright too for a different route there/back.