The River Beult (/ˈbɛlt/ BELT) is a tributary of the River Medway. It has several sources west of Ashford, including one at Woodchurch. It then flows through Headcorn. At Hunton, 7 furlongs (1.4 km) above Yalding it is joined by the major stream of the River Teise. Town bridge lies 10 ¹⁄₄ miles (16.5 km) from Allington, it is the longest mediaeval bridge in Kent. The river enters the Medway at Yalding. The River Beult is crossed by the railway between Headcorn and Staplehurst.