The River Rhondda is a river located in Wales, flowing through the Rhondda Valley. It is approximately 20 miles long and is known for its scenic beauty and historical significance, particularly during the Industrial Revolution when it played a crucial role in coal mining. The river has two main tributaries, the Rhondda Fawr and the Rhondda Fach, which converge near the town of Treorchy. Today, the River Rhondda is a popular spot for outdoor activities such as walking and fishing, and it contributes to the local ecosystem and economy.