The Ahr River is a tributary of the Rhine River in western Germany. It flows for about 89 kilometers (55 miles) through the states of North Rhine-Westphalia and Rhineland-Palatinate. The river is known for its picturesque landscapes, vineyards, and charming towns along its banks, making it a popular destination for tourists. The Ahr River originates in the Ahr Mountains and eventually joins the Rhine near the town of Remagen. It is significant for its wine production, particularly the Ahr Valley, which is famous for its red wines, especially those made from the Pinot Noir grape. The river also supports various recreational activities, including hiking and cycling.