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Lock Dimensions

What's the maximum length of boat to cruise a given canal?

Navigations listed below have lock dimensions of less than 72 ft long. Unless you know otherwise!!!

71ft 6in

  • Birmingham Canal Navigations
  • Birmingham & Fazeley Canal
  • Worcester & Birmingham Canal
  • Middle Level Navigations (boats over 60ft can only pass through Salters Lode on to the tidal Ouse at level water).


  • Huddersfield Narrow Canal
  • Macclesfield Canal
  • Peak Forest Canal
  • Sleaford Navigation
  • Witham Navigable Drains
  • Union Canal - Scotland (not connected to the main system)


River Ancholme above Harlam Hill Lock (8 miles)

68ft 6in

Forth & Clyde Canal - Scotland (not connected to main system)


Stainforth & Keadby Canal

64ft 9in

Monmouthshire & Brecon Canal (not connected to main system)


Leeds & Liverpool Canal - Rufford branch

61ft 6in

Sheffield & South Yorkshire Navigations


  • Yorkshire Ouse (above City of York to Swale Nab)
  • Leeds & Liverpool Canal - Wigan to Leeds
  • Chelmer & Blackwater Navigation (not connected to main system)


  • River Ure Navigation (incl Ripon Canal)
  • Pocklington Canal (not all locks restored)

57ft 6in

  • Calder & Hebble Navigation
  • Huddersfield Broad Canal


River Derwent


Bridgewater & Taunton Canal (not connected to main system)


Little Ouse River - last lock near Brandon

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  • ABNB Ltd

    Crick Wharf Marina, West Haddon Road, Crick, Northampton, NN6 7XT
  • 01788 822 115