Lough Derg is a large lake located in County Donegal, Ireland. It is part of the River Shannon system and is known for its scenic beauty and recreational activities. The lake covers an area of approximately 30 square kilometers and is surrounded by lush green hills and charming villages. The lake is popular for fishing, boating, and hiking, attracting both locals and tourists. It is also home to several islands, including Devenish Island, which features historical ruins. Lough Derg plays an important role in the local ecosystem and is a significant site for wildlife observation.