Lake Granby is the largest storage reservoir in the Colorado-Big Thompson Project and the second largest body of water in the state. Blue Mesa on the Gunnison River in Southwestern Colorado is the state's largest reservoir.
Water is pumped from Lake Granby via the Farr Pump Plant to the Granby Pump Canal, where it flows to Shadow Mountain Reservoir and through a connecting channel to Grand Lake.
Lake Granby is located on the Colorado River approximately five miles northeast of the town of Granby. The Colorado River flows from Shadow Mountain Reservoir into Lake Granby on its northeast side and exits the lake at Granby Dam near the Sunset Point boat launch and camping area.
Lake Granby has a capacity of 539,758 acre-feet of water and 40 miles of shoreline. It has a maximum depth of 221 feet when full. Construction of the dam and reservoir cost $12.9 million and began in late 1942. Water was first stored in Lake Granby on Sept. 14, 1949.
Area is Recreational Haven Lake Granby is a recreational haven. The lake is surrounded by the Arapaho National Forest, Arapaho National Recreation Area and Indian Peaks Wilderness Area.
This area attracts boaters, anglers, hikers, campers, snowmobilers and other recreationists. There are three boat launches, several campgrounds and trailheads on the lake’s shores. See the C-BT Recreation - West Slope page for more information.