River Darent

The Darent is a Kentish tributary of the River Thames and takes the waters of the River Cray as a tributary in the tidal portion of the Darent near Crayford. 'Darenth' is frequently found as the spelling of the river's name in older books and maps, Bartholomew's Canals and River of England being one example. Bartholomew's Gazetteer (1954) demonstrates that Darent means "clear water", a result of it springing from and running through chalk. The purity of the water was a major factor in the development of paper and pharmaceuticals in the area.

Darenth Parish (through which the river flows) derives from a Celtic phrase 'stream where oak-trees grow' (Irish: "dair" = 'oak-tree', "abha" = river) (compare e.g."Derwent"). The landscapes of the valley were painted in a visionary manner by the Victorian artist Samuel Palmer during the mid-1800s.

Fed by springs from the greensand hills south of Westerham in Kent and below Limpsfield Chart in Surrey, the Darent flows 21 miles (34 km) east then north by Otford and Shoreham, past the castle and the ruined Roman villa at Lullingstone, then by Eynsford, Farningham, Horton Kirby, South Darenth, Sutton-at-Hone, Darenth, and eventually to Dartford, whence it proceeds a final two miles as a tidal estuary until it drops into the Thames at Long Reach.

North of Dartford, the Darent is tidal and, just before entering the Thames, receives the waters of the River Cray at Dartford & Crayford Marshes where the rivers form administrative boundaries between Greater London and Kent, (specifically, the London Borough of Bexley and the Kentish borough of Dartford). The Darent enters Long Reach to the east of Crayford Ness.

Kent County Council has signposted a 19-mile (31 km) walking route along the Darent between the Greensand Hills above Sevenoaks and the Thames and named it the Darent Valley Path.