Ahr is a river in Germany, a left tributary of the Rhine. Its source is at an elevation of approximately above sea level in Blankenheim in the Eifel, in the cellar of a timber-frame house near the castle of Blankenheim. After 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 above sea level, it flows into the Rhine. The length is roughly , of which 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.
The Ahr and its tributaries are a main drainage system of the eastern Eifel. The watershed is approximately .
Ahr is a wine region (Anbaugebiet) for quality wine in Germany, and is located in the valley of the river Ahr, a tributary of Rhine, and is situated in the federal state of Rhineland-Palatinate. With only of vines as of 2008, it is one of smaller of Germany's 13 regions. Despite its northern location (it is for example situated north of Mosel region) it primarily produces red wines, and red grape varieties account for 86% of the vineyard area, which is more than in any other German wine region.
AHR, AhR, Ahr, or AHr may refer to:
The Ahr is a river in South Tyrol, Italy, which flows through the Tauferer Ahrntal.