Granby Reservoir is a large body of water located in Grand County, Colorado. It is the largest reservoir in the state, covering approximately 1,500 acres and providing essential water storage for the Colorado River system. The reservoir is primarily used for irrigation, municipal water supply, and recreational activities. The area around Granby Reservoir offers various outdoor activities, including fishing, boating, and hiking. It is surrounded by scenic landscapes, making it a popular destination for visitors. The reservoir is also home to diverse wildlife, contributing to the natural beauty of the region.