Otter Brook Lake offers many recreational opportunities including: swimming, picnicking, canoeing, fishing, hunting, and in the winter, cross-country skiing, snowshoeing, and snowmobiling.
The 10, 000 acre flood control project contains two developed recreational areas, Clough State Park operated by the State and Elm Brook Park operated by the Corps of Engineers.
The 15-mile stretch of the Pemigewasset River which flows through the reservoir lands is popular for fishing. Reservoir area is managed by the State for fish and wildlife.