Canal & River Trust
38 miles of navigable water, 6 locks, 5 named marinas and moorings. Passes Brecon, Crickhowell, Cwmbrân, Pontypool, Risca.
| Boat | Size | Fits? |
|---|---|---|
| Narrowboat | 57ft × 6ft 10in | Too big |
| Long narrowboat | 70ft × 6ft 10in | Too big |
| 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.
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 |
|---|---|---|---|---|
| Monmouthshire & Brecon Canal | 16.76 | 2.59 | 0.75 | 1.8 |
Each opens its Check a Mooring page: what's nearby on the water and ashore.
Mapped within 150 m of the Monmouthshire & Brecon Canal in OpenStreetMap. Volunteers map these, so there are gaps.
8 more without a name in OpenStreetMap.
1 more without a name in OpenStreetMap.
None mapped.
None mapped.
None mapped.
8 more without a name in OpenStreetMap.
No. A 10ft-wide boat is wider or longer than the Monmouthshire & Brecon Canal allows.
No. A 57ft × 6ft 10in narrowboat is bigger than the Monmouthshire & Brecon Canal allows.
About 38 miles of navigable water on our map, with 6 locks mapped in OpenStreetMap.
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