Odet

For other uses, see Odet (disambiguation).

Odet
The Odet at high tide
Location
Country	France
Physical characteristics
Source
• location	Brittany
Mouth
• location	Atlantic Ocean
• coordinates	47°51′45″N 4°6′9″W
Length	62.7 km (39.0 mi)
Basin size	724 km2 (280 sq mi)

The Odet is a river in western France (Finistère department), which runs from Saint-Goazec (near Leuhan, in the Montagnes Noires of Brittany) into the Atlantic Ocean at Bénodet. The name of the town of Bénodet comes from the river; ben means river mouth in Breton.

The river runs past, or through, the towns of Bénodet, Combrit, Plomelin, Quimper, Ergué-Gabéric, Briec-de-l'Odet, Langolen, Coray, Trégourez, Leuhan and Saint-Goazec. It is 62.7 km (39.0 mi) long and its basin area is 724 km² (280 sq mi).

The river is popular with kayakers.

In 2021 an article published in the Bulletin of the French Prehistoric Society reported that archaeologists had interpreted the Saint-Bélec slab, a 4,000-year-old stone rediscovered in 2014, as a three-dimensional representation of the Odet valley. This would make the Saint-Bélec slab the oldest known map of a territory in the world. According to the authors, the map probably wasn’t used for navigation, but rather to show the political power and territorial extent of a local ruler’s domain of the early Bronze age. Measures of the slab were 2.2 metres long and 1.53 metres wide.