Castle Mill Stream

Castle Mill Stream is a backwater of the River Thames in the west of Oxford, England.

[1] The stream leaves the main course of the River Thames at the south end of Port Meadow, immediately upstream of Medley Footbridge, split by the northern part of Fiddler's Island to the west.

Further south, the Isis Lock gives access to the Oxford Canal, and the short Sheepwash Channel leads west under the railway tracks to the main stream of the Thames.

[4] It continues under Oxpens Road and rejoins the Thames immediately upstream of the Gasworks Bridge.

[5] Empress Matilda (aka Queen Maud, 1102–1167), the daughter and dispossessed heir of Henry I, was there during her power struggle with King Stephen (1096–1154).