The Ahr Hills (German: Ahrgebirge or Ahreifel) are a range of low mountains and hills up to high and 25 kilometres (16 mi) long in the Eifel region of Germany, which lie roughly southwest of Bonn on the border between the German states of North Rhine-Westphalia and Rhineland-Palatinate.
The Ahr Hills are part of the Eifel, the bulk of which lies to the south and southwest of it. It lies on the left, i.e. northwestern, bank of the river Ahr, roughly 40 km southwest of Bonn. Sometimes the ridge on the right, southeastern, bank of the Ahr in the area of Altenahr is also counted as part of the Ahr Hills. This small range is bordered by a square enclosed by the Grafschaft and Remagen to the east, by Altenahr to the southeast, Antweiler to the south, Blankenheim to the west and Bad Münstereifel and Rheinbach to the north.
To the north the terrain of the Ahr Hills descends into the Cologne Bay, to the east it drops down to the Voreifel and the valley of the Middle Rhine, to the south on the far side of the Ahr is the Eifel proper (up to ), to the west the Zitter Forest and in the northwest the North Eifel.
The summits of the Ahr Hills include the:
- Aremberg ( ) with Aremberg Castle
- Michelsberg ( )
- Junkerberg ( )
- Knippberg ( )
- Hühnerberg (Lommersdorf) ( )
- Kopnück ( )
- Hühnerberg (Kirchsahr) ( )
- Tomberg (Tomburg Castle ) and the ruins of the
The Ahr Hills is crossed by the following streams, some of which have their sources here:
- Ahr (source in Blankenheim)
- Erft (source on the western edge)
- Swist (source near Kalenborn).
The following towns and villages border the Ahr Hills:
- Rheinbach (north)
- Meckenheim (northeast)
- Remagen (east)
- Bad Neuenahr-Ahrweiler (south)
- Antweiler (south)
- Blankenheim (west)
- Bad Münstereifel (northwest)
Other places in the Ahr Hills include:
The Große Eifelroute ("Great Eifel Route"), a tourist route, runs through the Ahr Hills. There are also numerous footpaths for walkers. Amongst its places of interest are Aremberg Castle, on the eponymous hill above Aremberg, and the ruins of the 11th-century castle of Tomburg above Wormersdorf with views of Cologne. Near Effelsberg is the Effelsberg Radio Telescope, on the summit of the Michelsberg is a Catholic chapel, dedicated to the Archangel Michael and regularly visited by pilgrims and walkers. Part of the Roman Eifel Aqueduct, which runs through the northern part of the Ahr Hills, is a popular tourist destination. The Ahr Valley with its wine centres is also picturesque; the southeastern slopes of the Ahr Hills above the Ahr have vineyards that may be walked through on the Red Wine Path (Rotweinwanderweg).