Belfast Lough is a large, shallow inlet located in Northern Ireland, near the city of Belfast. It stretches approximately 20 kilometers (12 miles) from the Belfast city center to the Irish Sea. The lough is surrounded by various towns and villages, including Holywood and Carrickfergus, and is known for its scenic beauty and rich marine life. The lough serves as an important shipping route and is home to several marinas and recreational areas. It is also a popular spot for birdwatching, with many species migrating through the area. The surrounding landscape features parks and coastal paths, making it a favored destination for outdoor activities.