The River Mourne is a river located in County Down, Northern Ireland. It flows through the picturesque Mourne Mountains and is known for its scenic beauty and clear waters. The river is approximately 20 kilometers long and eventually empties into Carlingford Lough. The River Mourne is popular for various outdoor activities, including fishing and hiking along its banks. The surrounding area is rich in wildlife and offers stunning views of the mountains, making it a favorite spot for nature enthusiasts and tourists alike.