Most specifically Box Hill, Ranmore Common and Leith Hill.
We've done some exploring of these areas, and found some nice routes, including some single track on Leith Hill and interesting sections of bridle path on Box Hill and Ranmore Common.
Though with nothing being marked and local knowledge being the best way to find trails, unless someone shows me something there is a good chance I'm not going to find it.
So has anyone got any particularly good tips for the area that they would like to share?