 The valley forms roughly a Z shape, the northern part following the line of the D3 immediately to the south of the Alaric Mountains, between Monze and Montlaur, and the southern part extending roughly from the slopes of the Corbières Massif in the west, to the entry of the gorge of the Sou River as it approaches its confluence with the Orbieu west of Lagrasse.However the precise extent of the area known as the Val de Dagne is more vague than this, and villages and hamlets beyond this main valley, particularly across its western watershed towards Limoux, are said to lie in the Val.Approaching from the direction of Carcassonne the northern part of the valley spreads out from Monze, and includes the villages of Pradelles-en-Val and Montlaur.