The Bluestack Mountains are a mountain range located in County Donegal, Ireland. They are part of the larger Donegal Highlands and are known for their stunning landscapes, including rugged peaks and deep valleys. The highest peak in the range is Tievebaun, which rises to 665 meters. This mountain range is popular for outdoor activities such as hiking and climbing, attracting nature enthusiasts and adventure seekers. The Bluestack Mountains are also home to diverse wildlife and unique flora, making them an important area for conservation and ecological studies.