The Sierra of Mourne is a mountain range located in County Down, Northern Ireland. It is known for its stunning landscapes, featuring rugged peaks and lush valleys. The highest peak, Slieve Donard, reaches an elevation of 850 meters, making it the tallest mountain in Northern Ireland. The Sierra is part of the Mourne Mountains area, which is popular for outdoor activities such as hiking and climbing. The region is also rich in biodiversity, home to various plant and animal species. Its scenic beauty has inspired many artists and writers throughout history.