The Connecticut Lakes are a group of lakes in Coos County, northern New Hampshire, United States, situated along the headwaters of the Connecticut River. They are accessed via the northernmost segment of U.S. Route 3, between the village of Pittsburg and the Canada port of entry south of Chartierville, Quebec. The lakes are located within the boundaries of Pittsburg, but are far from the town center. Connecticut Lakes State Forest adjoins them. There are four lakes: First, Second, Third and Fourth Connecticut Lake, numerically running south to north. The lakes decrease in size and increase in elevation, sequentially from first to fourth. The fourth lake is the source of the Connecticut River. The first three lakes can be viewed and accessed from U.S. Route 3, while the only access to the fourth lake is via the Fourth Connecticut Lake Trail, which goes in and out of Canada. All lakes are north of the 45th parallel. Lake Francis lies to the south of the four Connecticut Lakes. It is a man-made reservoir and the last of the major lakes along the Connecticut River in northern New Hampshire. The lakes First Connecticut Lake First Connecticut Lake is located in the town of Pittsburg, northeast of the village center. At , it is the eighth-largest lake located entirely in New Hampshire. It is the lowest in elevation and largest in surface area of the four Connecticut Lakes. Fish species include landlocked salmon and lake trout. The lake has average and maximum depths of and , respectively. There are three public boat launch locations, and ice fishing is permitted from January through March. Outflow of the lake into the Connecticut River is controlled via the First Lake Dam, located near U.S. Route 3 at the southwestern shore. Climate According to the Köppen Climate Classification system, First Connecticut Lake has a warm-summer humid continental climate, abbreviated "Dfb" on climate maps. The hottest temperature recorded at First Connecticut Lake was on July 8, 1921 and July 19, 1953, while the coldest temperature recorded was on February 1, 1920. A marker along the southwestern shore of the lake commemorates Luther Parker, a historical figure of the Republic of Indian Stream in the 1830s. Second Connecticut Lake Second Connecticut Lake, known in the past as Lake Carmel, is a water body in the town of Pittsburg, northeast of the village center. The second lake is higher in elevation