Just outside Sidmouth, near the Norman Lockyer Observatory is Salcombe Hill. Managed by the National Trust, you'll find an array of footpaths following clifftop, open farmland and woodland. Parking is available (pay by phone or free for National Trust members) and you'll find an information point and dog bin in the car park. Please check local signage as livestock are sometimes grazing on farmland. Beware of cliff edges.
