It then flows through Wellow before joining the Cam Brook at Midford to form Midford Brook, before joining the River Avon close to the Dundas Aqueduct.

On this basis the length of the Wellow Brook, from Radstock to the Avon, is 17.8 km (11.1 mi).

There are several springs dotted along the valley sides and the resultant streams are often lined with trees.

The junction of the valley sides with the base is usually gentle and rounded and the valley floors are narrow but flat with the brooks meandering freely across their flood plain.

This was taken advantage of in making anti-tank defences during World War II when many concrete bunkers known as pillboxes were built as part of the GHQ Line to defend against an expected German invasion.