Its source lies at  in the northern part of the Eifel in the Ahr Hills, north of the village of Kalenborn in the collective municipality of Altenahr in the county of Ahrweiler.
The source of this entity is located in the northern part of the Eifel mountain range in the Ahr Hills, situated just north of the village of Kalenborn and part of the Altenahr municipal area within the Ahrweiler district.