How about
Narberth – princes gate – ludchurch – straight on – colby – amroth – wisemans bridge – coppit hall – saundersfoot – turn right before st brides – devonshire drive redberth – sageston – carew – back lanes to cresselly – lawrenny – follow road round to yerbeston – up hill to templeton aerodrome – then depending on time either up to tavernspite or straight back to narberth
Not too long just short sharp hills