The River Elan is a river located in Wales, flowing through the scenic Elan Valley. It is approximately 20 kilometers long and is known for its beautiful landscapes and rich wildlife. The river is a key feature of the Elan Valley Reservoirs, which were built in the late 19th century to supply water to Birmingham. The River Elan is popular for various outdoor activities, including fishing and hiking along its banks. The surrounding area is part of the Elan Valley nature reserve, which offers opportunities for birdwatching and enjoying the natural beauty of the region. The river plays an important role in the local ecosystem.