Re: greenlaning dorset
you can join the TRF and they will have rideouts and possibly marked maps.
Otherwise get yourself an ordnance survey map of your area look for BOATS (byway open to all traffic) and ORPAS (other route with public access), this will not be definitive but will give you an idea where you can ride. You cannot ride on footpaths, bridleways of restricted byways and your vehicle must have tax, MOT and insurance.
Welcome to the TRF
Maps of Britain from Ordnance Survey - buy paper maps and GIS data
2004 KTM 950 ADV
2008 Transalp 650
1998 Suzuki DR350
Don't waste your time or time will waste you - Matthew james Bellamy