Ahr
River in Germany
title: "Ahr" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["ahr", "rivers-of-north-rhine-westphalia", "rivers-of-rhineland-palatinate", "rivers-of-the-eifel", "rivers-of-germany"] description: "River in Germany" topic_path: "geography/germany" source: "https://en.wikipedia.org/wiki/Ahr" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary River in Germany ::
::data[format=table title="Infobox river"]
| Field | Value |
|---|---|
| name | Ahr |
| name_etymology | Old High German aha ("water") |
| image | Ahrtal02.jpg |
| image_size | 300px |
| image_caption | In the valley of the Ahr |
| map | Ahr_verlauf.jpg |
| map_size | 300 |
| map_caption | The river Ahr |
| pushpin_map_size | 300 |
| subdivision_type1 | Country |
| subdivision_name1 | Germany |
| length | 89 km |
| discharge1_avg | 8.9 m3/s |
| source1_location | Blankenheim, Northern Eifel, North Rhine-Westphalia, Germany |
| source1_coordinates | |
| source1_elevation | 470 m |
| mouth | Rhine |
| mouth_location | Remagen, Rhineland-Palatinate, Germany |
| mouth_coordinates | |
| mouth_elevation | 58 m |
| progression | |
| basin_size | 900 km2 |
| :: |
| name = Ahr | native_name = | native_name_lang = | name_other = | name_etymology = Old High German aha ("water") | image = Ahrtal02.jpg | image_size = 300px | image_caption = In the valley of the Ahr | map = Ahr_verlauf.jpg | map_size = 300 | map_caption = The river Ahr | pushpin_map = | pushpin_map_size = 300 | pushpin_map_caption= | subdivision_type1 = Country | subdivision_name1 = Germany | subdivision_type2 = | subdivision_name2 = | subdivision_type3 = | subdivision_name3 = | subdivision_type4 = | subdivision_name4 = | subdivision_type5 = | subdivision_name5 = | length = 89 km | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= | discharge1_min = | discharge1_avg = 8.9 m3/s | discharge1_max = | source1 = | source1_location = Blankenheim, Northern Eifel, North Rhine-Westphalia, Germany | source1_coordinates= | source1_elevation = 470 m | mouth = Rhine | mouth_location = Remagen, Rhineland-Palatinate, Germany | mouth_coordinates = | mouth_elevation = 58 m | progression = | river_system = | basin_size = 900 km2 | tributaries_left = | tributaries_right = | extra = Ahr () is a river in Germany, a left tributary of the Rhine. Its source is at an elevation of approximately 470 m above sea level in Blankenheim in the Eifel, in the cellar of a timber-frame house near the castle of Blankenheim. After 18 km it crosses from North Rhine-Westphalia into Rhineland-Palatinate.
The Ahr flows through Ahr valley or Ahrtal, passing through the towns of Schuld, Altenahr and Bad Neuenahr-Ahrweiler. Between Remagen and Sinzig (south of Bonn), at about 50 m above sea level, it flows into the Rhine. The length is roughly 89 km, of which 68 km is within Rhineland-Palatinate. The Ahr has a gradient of 0.4 percent in its lower course, and 0.4 to 0.8 percent in its upper course.
::figure[src="https://upload.wikimedia.org/wikipedia/commons/c/ca/Blankenheim_3_Ahrquelle.JPG" caption="Source of Ahr in Blankenheim"] ::
The Ahr and its tributaries are a main drainage system of the eastern Eifel. The watershed is approximately 900 km2.
History
There were isolated settlements in the Ahr valley beginning at the latest in Roman times, evidenced by the Roman villa near Ahrweiler. Owing to their isolated location, the upper and middle parts of the course were sparsely populated.
That began changing in the mid-19th century. The development of settlements and transportation routes (including three railway lines) and the expansion of the area used for agriculture in the Ahr valley led to the narrowing and constraint of the riverbed. The course of the river was graded and its banks were stabilized.
Catastrophic flash flooding occurred on the Ahr in 1910 and 2021 resulting in the deaths of hundreds.
Course
The Ahr rises in the middle of the village of Blankenheim, in the Eifel region of the German state of North Rhine-Westphalia, in the basement of a timber-framed house in an enclosed spring at a height of . It then flows through the Schwanenweiher pond below Blankenheim Castle.
Main article: Ahr Valley
The stream, which runs in a south-easterly direction, through the valley meadows of upper Ahr valley, has not cut very deeply into the heights of the Eifel. Much of the upper Ahr valley is protected and follows the B 258 federal road. Below the hamlet of Ahrdorf in the municipality of Blankenheim, the Ahr reaches its southernmost point and enters the state of Rhineland-Palatine. From Müsch via Antweiler to Fuchshofen, the river runs northwards and turns east at Schuld heading through Insul to Dümpelfeld. Here, the Ahr collects the waters of the Adenauer Bach coming from the right and flowing in a northeasterly direction. In Altenahr, the valley bends to the east and initially follows a very winding course. Here the river is accompanied by the B 267, although it does not follow every loop in the river. In Altenahr, the largest bend in the river beings; it is protected because of its flora and fauna. From here, the valley becomes a gorge bordered by the steep cliffs of the Ahr Hills. From Reimerzhoven the valley sides are dominated by vineyards, especially on the south-facing slopes north of the river, particularly around the villages of Mayschoß, Rech, Dernau and Marienthal. The last narrow point in the Ahr valley occurs below the Bunte Kuh ("coloured cow"), a rock formation that almost reaches the river and leaves little room for road and railway. In Walporzheim, the valley widens abruptly, and the Ahr passes through the county town of Bad Neuenahr. In Heimersheim, the vineyards end. The valley floor between Bad Bodendorf on the northern side and Sinzig on a terrace in the south is dominated by agriculture and fruit and vegetable growing.
The mouth of the Ahr lies on the plain of the Golden Mile, between the Remagen district of Kripp and the town of Sinzig at a height of about . Since being re-naturalised (from 1979, see aerial photographs) it has been one of the few natural river mouths on the Rhine and is under protection.
Blankenheim Eifel Ahrquelle.jpg|Source of the Ahr (in front of the head) in Blankenheim ahr01.jpg|The middle Ahr below Altenahr with the rock formation of Langfig Ahrtal02.jpg|The Ahr by the Bunte Kuh rock formation at Walporzheim Bundesarchiv Bild 195-0577, Rheinbefliegung, Niederbreisig - Kripp.jpg|The mouth of the Ahr on the Rhine before re-naturalisation (1957) Ahr, Mündung.jpg|The mouth of the Ahr after re-naturalisation. Right: this village of Kripp
Tributaries
The tributaries of the Ahr include (in upstream order):
::data[format=table] | Name || Waterbody No. (GKZ) || Length (km) || Direction|| Confluence at km || Place || Remarks | |---| | Stegbach | | Mülheimer Bach | | Nonnenbach | | Reetzer Bach | | Schaafbach | | Lampertsbach | | Fuhrbach | | Mühlenbach | | Michelsbach | | Aulbach | | Willemsbach | | Göttersbach | | Ahbach | | Trierbach | | Huhnenbach | | Limbach | | Eichenbach | | Laufenbach | | Dreisbach | | Armuthsbach | | Holzseifen | | Atzenbach | | Lückenbach | | Adenauerbach | | Ommelbach | | Liersbach | | Kesselinger Bach | | Steinbach | | Stream from Schorling | | Sahrbach | | Vischelbach | | Stream from Burtscheiderberg (Roßbach) | | Stream from Sonnenheck (Junge Berren) | | Nollbach (Donnenbach) | | Kratzenbach | | Geusbach | | Wingsbach | | Mühlenteichgraben | | Bachemer Bach | | Fuchsbach | | Mühlenteich | | Idienbach | | Leimersdorfer Bach | | Lohrsdorfer Bach | | Hellenbach | | Harbach | ::
Tributaries with a length of over 7 km (from source to mouth): Left tributaries are in dark blue; right tributaries in light blue. TimeAxis = orientation:horizontal format:xxxx ImageSize = width:750 height:auto barincrement:25 PlotArea = left:10 right:10 top:10 bottom:40 AlignBars = justify Colors = id:canvas value:rgb(0.97,0.97,0.97) BackgroundColors = canvas:canvas Period = from:0 till:30 ScaleMajor = unit:year increment:5 start:0 gridcolor:blue BarData= barset:Flusslänge Define $left = textcolor:white color:oceanblue Define $right = textcolor:black color:skyblue PlotData= width:18 fontsize:M textcolor:black color:skyblue shift:(20,-6) anchor:from barset:Flusslänge from:start till:11.4 $right text:Schaafbach (11.4 km) from:start till:9.5 $right text:Lampertsbach (9.5 km) from:start till:7.1 $left text:Mühlenbach (7.1 km) from:start till:8.3 $right text:Michelsbach (8.3 km) from:start till:14.9 $right text:Ahbach (14.9 km) from:start till:25.3 $right text:Trierbach (25.3 km) from:start till:10.0 $left text:Dreisbach (10.0 km) from:start till:18.4 $right text:Armuthsbach (18.4 km) from:start till:15.7 $right text:Adenauerbach (15.7 km) from:start till:14.5 $left text:Liersbach (14.5 km) from:start till:14.1 $right text:Kesselinger Bach (14.1 km) from:start till:15.3 $left text:Sahrbach (15.3 km) from:start till:10.5 $left text:Vischelbach (10.5 km) from:start till:8.3 $left text:Leimersdorfer Bach (8.3 km) from:start till:7.7 $right text:Hellenbach (7.7 km) from:start till:9.9 $right text:Harbach (9.9 km)
TextData= fontsize:M pos:(10,20) text:km
Viticulture
::figure[src="https://upload.wikimedia.org/wikipedia/commons/6/68/Weintrauben.Rot.JPG" caption="''Spätburgunder'' grapes"] ::
The Ahr is well known for the many vineyards that grace the hillsides downstream of the village of Altenahr. The small Ahr wine region is nevertheless the largest contiguous red wine-growing area in Germany, noted especially for wines made from the Spätburgunder (Pinot noir) grape. The Red Wine Trail runs through the southern slopes of the lower Ahr Valley, passing inter alia the former government bunker.
References
References
- (1981-06-23). "Rechtsverordnung über das Naturschutzgebiet Mündungsgebiet der Ahr". Landkreis Ahrweiler.
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