Derwent Reservoir is located in the North Pennines of England, primarily serving as a water supply for the surrounding areas. It was constructed in the early 20th century and is part of the Derwent Valley Water Supply System. The reservoir is surrounded by scenic landscapes, making it a popular spot for outdoor activities such as walking and birdwatching. The reservoir covers an area of approximately 1,200 acres and has a maximum depth of around 50 feet. It is home to various wildlife, including birds and fish, contributing to the area's biodiversity. The surrounding region is also known for its rich history and natural beauty, attracting visitors year-round.