The Pipp Brook is a left-bank tributary of the River Mole, Surrey, England. It rises at two main springs north of Leith Hill on the Greensand Ridge, then descends steeply in a northward direction, before flowing eastwards along the Vale of Holmesdale. It runs to the north of Dorking High Street, before discharging into the Mole at Pixham.

The River Mole is a tributary of the River Thames in southern England. It rises in West Sussex near Gatwick Airport and flows northwest through Surrey for 80 km to the Thames at Hampton Court Palace. The river gives its name to the Surrey district of Mole Valley.