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Your definition of crossing is exactly as I intended it. Even though in reality the King's X mess does not matter because entering AND leavibg towards the north-east would not yield a very long snake... At Waterloo, it seems that all reasonable snakes using London Bridge - Southwark - Waterloo - Lambeth North - Kennington can instead use Elephant & Castle - Lambeth North - Waterloo for the same number of stations. I think these are the only hair splitting places. But I'm more than happy with your definition.

As for your solution, I can only say there is room for significant improvement!

I think I have an improvement:

Epping Woodford Stratford via Hainault Waterloo Elephant & Castle Stockwell Victoria South Kensington Green Park Westminster Mile End Bank Euston Tottenham Court Road Holborn Leicester Square Charing Cross Oxford Circus Notting Hill Gate Gloucester Road Acton Town Rayners Lane Wembley Park Baker Street South Kenton

For 122 stations.

Getting closer, but a few more to go! You have not yet identified the optimum finish station...

It's not Heathrow, is it? Either there, Upminster or Amersham/Chesham

I've got 122 for both Epping - High Barnet and Epping - Upminster, but struggling to find 123.

124 if I've counted correctly

Epping Woodford Stratford (via Hainault) Waterloo Elephant & Castle Stockwell Victoria High Street Kensington Earls Court Acton Town (via District) Rayners Lane Wembley Park Baker Street (via Jubilee) Paddington (via Bakerloo) Notting Hill Gate Bond Street Westminster Mile End Bank Kings Cross Leicester Square Charing Cross Oxford Circus Tottenham Court Road High Barnet (via Mornington Crescent)

greatkingrat wrote:124 if I've counted correctly

Epping Woodford Stratford (via Hainault) Waterloo Elephant & Castle Stockwell Victoria High Street Kensington Earls Court Acton Town (via District) Rayners Lane Wembley Park Baker Street (via Jubilee) Paddington (via Bakerloo) Notting Hill Gate Bond Street Westminster Mile End Bank Kings Cross Leicester Square Charing Cross Oxford Circus Tottenham Court Road High Barnet (via Mornington Crescent)

A couple more to go - still not the best finishing station!

Think I got 125 doing Epping - Morden Also nearly got quite a bit more doing Epping - H&W, but realised I went through Baker Street twice

Tube Geek wrote:Think I got 125 doing Epping - Morden

I don't think so...

126 I hope...

Epping Woodford Mile End via Hainault Liverpool Street (on H&C) Embankment Piccadilly Circus Holborn Bank Euston Tottenham Court Road Notting Hill Gate Paddington (B/C/D) Baker Street (on Bakerloo) Wembley Park (on Jubilee) Rayners Lane Ealing Common/Acton Town Earl's Court (on District) High Street Kensington Gloucester Road/South Kensington Green Park Westminster Victoria Stockwell Elephant & Castle Waterloo West Ham Upminster

This route isn't doable until Paddington Bakerloo reopens.

Think I've got 130 for the old one; As above, only at Mile End go straight to Embanment without Liverpool Street, and at Holborn go to KCSP Liverpool Street Bank.

Tube Geek wrote:Think I've got 130 for the old one; As above, only at Mile End go straight to Embanment without Liverpool Street, and at Holborn go to KCSP Liverpool Street Bank.

Nope, you've passed through both Moorgate and KCSP twice - KCSP Liverpool Street Bank Euston!!!

With the new Tube TfL Services Map including the Tramlink, I thought I'd see how many I can get including that. The answer is.... 171!

Epping Woodford Stratford Romford Upminster West Ham Canning Town (by DLR) Canary Wharf Poplar Shadwell West Croydon East Croydon Wimbledon Earl's Court Ealing Broadway Shepherd's Bush Willesden Junction Baker Street (including Paddington (B)) Charing Cross Tottenham Court Road Liverpool Street KCSP Finsbury Park (by Picc) Highbury & Islington Westminster London Bridge Stockwell Victoria South Kensington Green Park Bond Street Notting Hill Gate Edgware Road.

Note this might be 175, as I added Queensway NHG Edgware Road at the end after playing around to try and get more than the 133 I originally had!

West Croydon is two separate stations, so all the Tramlink does is make the Wimbledon finish extremely long.

Well that's annoying!