There are 29 Railway Stations on the edge of Network Rail Zone 4 excluding Trams and London Underground etc  (the extent of my Annual Travel Card), my objective is to travel to each of these Stations and then walk home. I may do these in one go, I may split the journey or I may even combine some journeys, for example Beckenham Junction and Shortlands are very close to each other.

Here is a list of the 29 Railway Station  and notional distances
clockwise from the River Thames:

Abbey Wood - SouthEastern - 4 miles
Welling - SouthEastern - 1.7 miles
New Eltham - SouthEastern - 2.3 miles
Elmstead Woods - SouthEastern - 4 miles
Bromley North - SouthEastern - 4.3 miles
Shortlands - SouthEastern & Thameslink - 6.3 miles
Beckenham Junction - SouthEastern & Southern - 6.3 miles
Elmers End - SouthEastern - 7.9 miles
Norwood Junction - Southern, Thameslink, London Overground - 8.7 miles
Selhurst - Southern - 9.3 miles
Hackbridge - Southern & Thameslink - 13 miles
Sutton Common - Southern & Thameslink - 15 miles
Worcester Park - SouthWest - 17 miles
Malden Manor - SouthWest - 16 miles
New Malden - SouthWest - 16 miles
St Margarets - SouthWest - 18 miles
Isleworth - SouthWest - 19 miles
Southall - Heathrow Connect & Great Western Railway - 21 miles
Greenford - Great Western Railway - 21 miles
Sudbury Hill Harrow - Chiltern Railways - 21 miles
Kenton - London Overground - 21 miles
Mill Hill Broadway - Thameslink - 20 miles
Oakleigh Park - Great Northern - 19 miles
Winchmore Hill - Great Northern - 17 miles
Edmonton Green - London Overground - 15 miles
Angel Road - London Overground - 15 miles
Highams Park - London Overground - 13 miles
Goodmayes - TFL Rail - 9.7 miles
Barking - London Overground & C2C - 9.7 miles