Easy Forest of Bowland routes

[ScotHill]

I'm cycling from Lake District to Preston and wanting to get a taste of the Forest of Bowland but avoiding the silliest hills - the route from Bentham, Slaidburn and Longridge has a climb of about 1500ft straight up and down which I'm too old for now.

Are there any other roads that get into the hills a little without going so high, probably on the western side?