The Prees Arm of the canal was originally intended to reach Prees, but only the first were constructed, terminating at Quina Brook. Much of the ground through which it passed is formed of peat. Today it is only open for 7 furlongs (1.4 km), with two lift bridges, to a marina at the end of the navigable part; beyond that, another , as far as Waterloo Bridge, is partially watered and forms the Prees Branch Canal Nature Reserve. The remaining is dry, but can be followed in the landscape as most of it is marked by trees growing along its course. The towpath is on the eastern bank from the junction to Dobson's Bridge, and then crosses over to the other side, where it remained to the end of the canal at Quina Brook.
