La Courtonne
Based on OpenStreetMap data, La Courtonne is 18 km long.
La Courtonne is in France, flowing through the subregions of Calvados, Eure
Map
osm.org Distributaries / Outflows
Tributaries
La Courtonne has 1 tributaries.
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Le Douet du Valétable, which joins it at N 49° 7′ 12″, E 0° 20′ 34″ at OSM node
n3344848759, and 2 km of total upstream flows in.