The very eastern part of Belgium (the High Fens and most of the German-speaking Community of Belgium) and the northern part of Luxembourg (the Oesling) are considered to be both parts of the Ardennes and parts of the Eifel.
The western border of the Eifel is at the Belgian and Luxembourgian Ardennes. The eastern border is at the Westerwald across the Rhine River. The southern border is at the Hunsrück across the Moselle River. The northern border is at the lower regions of the Rhineland.
Few people live in the mountain range. It has many trees, reservoirs and rivers.
The biggest settlement is the city of Aachen at the northern edge.
Because of its elevation, temperatures are low.
The Eifel is divided into:
Three Central Franconian dialects of German are spoken in the Eifel:
- Ripuarian in the North Rhine-Westphalia part and bordering Belgium
- Moselle Franconian dialects in the Rhineland-Palatinate part and bordering Belgium
- Luxembourgish in Luxembourg and bordering Belgium