The Cadarn River is rather short river. It begins at a large lake in northern central Avalonia. It flows south, before emptying into the Draconem River.
Though the river is relatively short, it was strategic because it connected the northern rivers from Mitgardia to the rivers that flow to Kaliphlin in the south. Because of this, the city of Albion was built where it emptied into another strategic river, the Draconem.