Route: Box Hill Round (United Kingdom)

As this is a circular route you can start anywhere.  A convenient start is Headley Heath car park. The route incorporates three of the National Trust walks (Happy Valley, Juniper Walk & Stepping Stones) and includes a short road section that is part of the famous 2012 London Olympics cycling route (Zig Zag Road). This is a challenging route with ~1000m of elevation over a distance of 22.4km. It passes White Hill, Juniper Hill, Lodge Hill & Box Hill and boasts spectacular views, a river crossing and historic over a mixed terrain. 

Box Hill is a summit of the North Downs in Surrey and lies within the Surrey Hills Area of Outstanding Natural Beauty, approximately 31 km (19 mi) south-west of London. The hill gets its name from the ancient box woodland found on the steepest west-facing chalk slopes overlooking the River Mole. The western part of the hill is owned and managed by the National Trust, whilst the village of Box Hill lies on higher ground to the east.

https://www.nationaltrust.org.uk/box-hill

https://en.wikipedia.org/wiki/Box_Hill,_Surrey