Length: 16¾ km (10.4 miles). Toughness: 5/10
10:02 Dorking train from Waterloo (Vauxhall 10:06, Clapham Jct 10:12, etc), arriving Box Hill & Westhumble at 10:51. If you might want to switch to one of the alternative endings (see the walk document for details), a return to Dorking is the same fare as Box Hill.
Trains back from Box Hill & Westhumble are hourly at xx:10 to Waterloo; half-hourly at xx:16 & xx:46 to Victoria (in both cases, a few minutes earlier from Dorking).
Anyone returning early from the Scottish trip will consider this outing a gentle stroll in the park, but it does start with the classic climb up the Burford Spur to the famous viewpoint on Box Hill. It goes out to Betchworth past old chalk quarries on the North Downs escarpment and returns along the Mole Valley, with a few more ups and downs along the way.
The food and drink options on this walk always seem to go down well. If you want a pub lunch the Red Lion in Betchworth serves large portions and doesn't seem fussed about advance bookings. Brockham offers several options for a mid-afternoon refreshment stop, including its popular Teas on the Green outside the church. And at the end of the walk there's a pub on the road to the station.
You'll need to bring the directions from the L=swc.396 page.