Lake Attitash is a lake located on the border of Merrimac, Massachusetts and Amesbury, Massachusetts, and constitutes at least a portion of Amesbury's water supply.There are beaches both on the Amesbury and Merrimac shores. Merrimac's beach is known as Indian Head Park. The lake was formerly known as "Kimball's Pond".The lake is popular with seasonal tourists, as well as residents. It is normally safe for swimming. Boats are allowed on the lake.This shallow, 360acre enlarged natural great pond has a maximum depth of 30ft and an average depth of 11ft. The shoreline is extensively developed; roads and cottages, two or three rows deep in places, virtually ring the entire lake, as well as a summer boys' camp, and at least two boat docks. There are literally hundreds of boats of all types and sizes. The only significant weed beds are located in the inlet and outlet coves.Public access for boating has been created by the Massachusetts Office of Fishing and Boating Access (formerly known as the Public Access Board) by constructing a parking lot and launching ramp. The parking lot can accommodate nearly two dozen vehicles.INFO BELOW IS FROM 1993The last fisheries survey – conducted in 1978 – located nine of the 11 species known to be present in this water. Largemouth bass and chain pickerel are common and appear at least moderately fished. Pumpkinseeds dominate the fishery, although white perch and brown bullhead are very common.