The River Tillingbourne runs along the south side of the North Downs and joins the River Wey at Guildford. Its source is a mile south of Tilling Springs to the north of Leith Hill at grid reference TQ143437 and it runs through Friday Street, Abinger Hammer, Gomshall, Shere, Albury, Chilworth and Shalford. The source is a semi-natural uninhabited area. The catchment is situated on sandstone which has a low rate of weathering. The Tillingbourne is 24 km (15 mi) in length.

Shalford Mill is an 18th-century Grade II* listed watermill located on the River Tillingbourne in Shalford, near Guildford, Surrey, England. In 1932, the mill was endowed to the National Trust by a group of eccentric young female philanthropists called Ferguson's Gang.