The Llangollen Canal runs from the Shropshire Union Canal at Hurleston Junction to Llantysilio Bridge just beyond Llangollen, where it terminates into a feeder from the River Dee. The Llangollen Canal also links to the Montgomery Canal at Frankton Junction, and is 46 miles (74km) long and has 21 locks.
There are three arms, none with any locks:
Ellesmere Arm - open - 0.25 miles (0.4km)
Prees Branch - restored for 1.5 miles (2.4km) and 2.0 miles (3.2km) derelict.
Whitchurch Arm - restored for 0.25 miles (0.4km) and 0.75 (1.2km) proposed for restoration.
The maximum size of boat that can use the Llangollen Canal is
length: 73' 10" (22.51 metres) - Grindley Brook locks
width: 7' 0" (2.13 metres) - Hurleston Bottom Lock
headroom: 7' 0" (2.13 metres)
draught: 3' 11" (1.2 metres) - cill of Grindley Brook locks
Above Trevor, the canal shallows, and boats with a draught of more than 2' 9" (0.84 metres) will struggle, though historic narrow boats with a draught of 3' 0" (0.91 metres) have reached Llangollen.
A Sanitary Station key is required for Bridge 20 (Wrenbury Lift Bridge - electric)