Wellow Brook is a small, meandering river in Somerset, England, known primarily as a wild trout fishery. It originates near Ston Easton Park and flows eastward through Midsomer Norton, where it is joined by the River Somer. The brook continues through the village of Wellow before its confluence with the Cam Brook at Midford to form Midford Brook, which ultimately drains into the River Avon near the historic Dundas Aqueduct. The valley features rounded, undulating sides with several springs and tree-lined streams feeding into it. The brook itself is quite deep in places with frequently steep sides, a characteristic historically utilized for World War II anti-tank defences. The river meanders freely across a narrow, flat floodplain, with a junction between valley sides and base that is typically gentle and rounded.