Flat, scenic and some hidden gems. Head east towards Shoreham-by-Sea and the Adur River valley that dissects the South Downs National Park. Pick up the South Downs link here and go as far as your legs can take you in one day. We have loaded a route past Bramber Castle and as far as Southwater Country Park. Recommended mountain bike and Garmin Edge Satnav. Picture of bikes at disused railway.