Lay (river)

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Mareuil-sur-Lay-Dissais 001.JPG
The Lay at Mareuil-sur-Lay-Dissais.
Native name Le Lay
Country France
Basin features
Main source Saint-Pierre-du-Chemin
195 m (640 ft)
46°42′34″N 00°42′37″W / 46.70944°N 0.71028°W / 46.70944; -0.71028
River mouth Bay of Biscay
0 m (0 ft)
46°19′14″N 01°18′10″W / 46.32056°N 1.30278°W / 46.32056; -1.30278Coordinates: 46°19′14″N 01°18′10″W / 46.32056°N 1.30278°W / 46.32056; -1.30278
Basin size 1,750 km2 (680 sq mi)
Physical characteristics
Length 120.3 km (74.8 mi)
  • Average rate:
    14 m3/s (490 cu ft/s)

The Lay (French: le Lay) is a 120.3 km (74.8 mi) long river in the Vendée département, western France. Its source is at Saint-Pierre-du-Chemin. It flows generally southwest. It flows into the Bay of Biscay between La Faute-sur-Mer and L'Aiguillon-sur-Mer, 20 km (12 mi) northwest of La Rochelle.

Its main tributaries are the Yon and the Smagne.

Communes along its course[edit]

This list is ordered from source to mouth: