Canal & River Trust
32 miles of navigable water, 4 locks, 1 named marina or mooring. Passes Lincoln, Boston.
| Boat | Size | Fits? |
|---|---|---|
| Narrowboat | 57ft × 6ft 10in | Fits |
| Long narrowboat | 70ft × 6ft 10in | Fits |
| Widebeam | 60ft × 10ft | Fits |
| Widebeam | 60ft × 12ft | Fits |
| Dutch barge | 70ft × 14ft 6in | Fits |
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.
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 |
|---|---|---|---|---|
| Lincoln to Stamp End Lock | 22.86 | 5.4 | 1.52 | 2.74 |
| Stamp End Lock to Boston Grand Sluice | 21.41 | 5.3 | 1.52 | 3.5 |
Each opens its Check a Mooring page: what's nearby on the water and ashore.
Mapped within 150 m of the River Witham Navigation in OpenStreetMap. Volunteers map these, so there are gaps.
None mapped.
None mapped.
None mapped.
None mapped.
None mapped.
None mapped.
Yes. A 60ft × 10ft widebeam is within every published limit on the River Witham Navigation.
Yes. A 57ft × 6ft 10in narrowboat is within every published limit on the River Witham Navigation.
About 32 miles of navigable water on our map, with 4 locks mapped in OpenStreetMap.
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