Canal & River Trust

Northampton Arm

4.8 miles of navigable water, 18 locks, 1 named marina or mooring. Passes Northampton.

Will your boat fit?

Boat	Size	Fits?
Narrowboat	57ft × 6ft 10in	Fits
Long narrowboat	70ft × 6ft 10in	Fits
Widebeam	60ft × 10ft	Too big
Widebeam	60ft × 12ft	Too big
Dutch barge	70ft × 14ft 6in	Too big

Length and beam against Canal & River Trust. “Some sections” means your boat is too big for at least one section or lock. Draught and headroom aren't checked here: see the table below.

Published size limits

Maximum boat sizes in metres, from the Canal & River Trust's waterway dimensions (page last edited 26 Mar 2026). “–” means the Trust doesn't give a figure.

Section	Length	Beam	Draught	Headroom
Northampton Arm (narrow)	21.95	2.13	1.1	2.18

Marinas and moorings

Each opens its Check a Mooring page: what's nearby on the water and ashore.

Gayton Marina marina

Services on the water

Mapped within 150 m of the Northampton Arm in OpenStreetMap. Volunteers map these, so there are gaps.

Water points 1

Gayton Junction Water Point

Elsan disposal 1

Gayton Junction Elsan Point

Pump-out 0

None mapped.

Boat fuel 1

1 more without a name in OpenStreetMap.

Rubbish disposal 1

Gayton Junction Rubbish Disposal

Winding holes 1

1 more without a name in OpenStreetMap.

Questions

Can a widebeam go on the Northampton Arm?

No. A 10ft-wide boat is wider or longer than the Northampton Arm allows.

Will a 57ft narrowboat fit on the Northampton Arm?

Yes. A 57ft × 6ft 10in narrowboat is within every published limit on the Northampton Arm.

How long is the Northampton Arm, and how many locks does it have?

About 4.8 miles of navigable water on our map, with 18 locks mapped in OpenStreetMap.