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Guide to the Llangollen Canal

The Llangollen Canal has been described as the most beautiful canal for boat trips in the UK. This scenic waterway and canal system crosses the border between England and Wales, linking boats in the Llangollen in Denbighshire, North Wales to Hurleston in south Cheshire, via the town of Ellesmere.

A brief history of the Llangollen Canal

The Llangollen Canal’s history began when the canal was part of the Ellesmere Canal, first proposed in 1791 by a group of industrialists who owned coal mines and ironworks near Llangollen. If they could link this mining area to the River Mersey in the north and the River Severn in the south with a Mersey canal then they could distribute their goods more easily.

As part of the Shropshire Union system, the Chester canal thrived until the end of the First World War, after which it saw very little traffic and the navigation was formally abandoned.

The route was designated as a cruiseway for boat trips in 1968 and as leisure use of the canals grew, the route was rebranded as “The Llangollen Canal” in the 1980s, becoming one of the most popular UK canals routes for holidaymakers. In 2009, when the 11-mile (18 km) stretch from Gledrid Bridge near Rhoswiel to Horseshoe Falls including Pontcysyllte and Chirk aqueducts was declared a World Heritage site by UNESCO.

The Dee Bridge in Llangollen

Top Llangollen Canal Facts

  • Main Line Canal Length

    41 Miles

  • Number of Locks


  • World Heritage Site

    The 11 miles of the Llangollen Canal and its associated structures gained World Heritage status in 2009.

  • Two Famous Aqueducts

    The Pontcysyllte Aqueduct and the Chirk Aqueduct are found on the Llangollen Canal.

Llangollen Canal Black Prince Holidays

Route Overview

The Llangollen Canal leaves the Shropshire Union Canal in Hurleston in rural Cheshire and climbs through the peaceful Shropshire countryside, passing through the little towns of Whitchurch and Ellesmere to cross the border into Wales near Chirk.

From Chirk the canal continues to cut though increasingly hilly countryside to finish alongside the River Dee which falls out of Snowdonia, just above Llangollen. The small town of Llangollen, known as the ‘gateway to Wales’, has lots of attractions, from the steam railway to a whole range of outdoor activities. Llangollen is part of the UNESCO World Heritage Site along eleven miles of beautiful canal from Gledrid to the Horseshoe Falls via the spectacular Pontcysyllte Aqueduct.

The Llangollen Canal is 41 miles long and takes at least three days to cruise the canal system and rivers (one-way), more when busy.

You can find out more about our boat hires, cruise guides and waterways maps on our canal boat holiday base information pages for canal boat holidays in Wales.


Feats of Engineering on the Llangollen

Chirk Aqueduct

Chirk aqueduct is an impressive structure of brick and stone pillars, 70-foot high and 710-foot long which carries the Llangollen Canal across the Ceiriog Valley. Designed by Thomas Telford, the water is carried in a cast iron trough. It was completed in 1801 and the railway viaduct runs alongside it, carrying the main line railway through to Holyhead at the same time as it carries the canal. As you cross the aqueduct you enter Wales and immediately after the aqueduct comes Chirk Tunnel.

Chirk Tunnel

This short tunnel opens out at the end of the Chirk Aqueduct. It is 421 meters long, designed by William Jessop and Thomas Telford and is unusual for having a complete towpath inside. Boats cannot pass each other in the tunnel but fortunately, it is straight enough to be able to see if a boat is already inside.

Pontcysyllte Aqueduct

Perhaps the greatest feat of engineering on the entire canal network in the UK is the Pontcysyllte Aqueduct, which is a highlight when it comes to tourist attractions on the Llangollen canal walk. The aqueduct was designed and built by Thomas Telford, who realised that such a high crossing of the River Dee was necessary to complete the route of the canal to Llangollen. He had already built the Chirk aqueduct and so used similar techniques, building stone piers and placing the cast iron troughs on top of them.

The aqueduct has 18 arches, is 12 ft (3.7 m) wide and is the longest aqueduct in Great Britain at 336 yd (307m) long. It is also the highest canal aqueduct in the world at 126 ft (38m) high.
Every ten years or so the aqueduct is drained for maintenance. It is emptied via a giant plug in the trough in the middle of the aqueduct!

Hurleston Flight & Grindley Staircase

The Llangollen Canal is fed from the River Dee at Llantysilio and has twenty-one locks. The last four are in a close flight at Hurleston Junction where the canal meets the Shropshire Union Canal. There, the four locks drop the water level by 34ft 3in (almost 10.5 metres).

The Grindley Brook locks are called ‘Staircase Locks’ as one lock opens directly into the bottom of the next lock. These locks raise the boats up from the Cheshire Plains to the Welsh hills.

Did You Know?

  • Let’s do business!

    The original Ellesmere Canal was built by industrialists to transport local supplies of iron and coal out of Wales.

  • Thomas Telford

    This famous engineer in the late 1700s designed not only the Chirk and Pontcysyllte Aqueducts, but also for the building of bridges, roads and churches.

  • What was the main use?

    The Ellesmere Canal was an excellent way of moving bulky cargo such as slate, clay, limestone, lime, coat, grain and malt. Sometimes even cheese!

  • The iron industry

    All the raw materials for making iron (iron ore, coal and limestone) were found in North East Wales. The pig iron was delivered to the canal side, loaded onto narrowboats and taken to local forges and foundries.

  • Not just for cargo...

    In 1884, a horse-drawn passenger boat service for sightseers started. People can still travel by horse boat today starting from Llangollen Wharf.

Aqueduct Llangollen

Black Prince Cruising Routes

You can enjoy a canal cruise on the Llangollen Canal starting from our narrowboat hire base at Chirk in Wrexham. Check out our canal maps and cruise guides on our base page for more information about canal boat hire for your canal holiday.

Chirk Marina on the Llangollen Canal

Black Prince Canal Guides

Below are links to a few of our other canal specific guides and canal maps to help inspire you on your next canal holiday: