than the first lake, and shallower. Fish species include brook trout, landlocked salmon, and lake trout. There is one public boat launch location, and ice fishing is permitted from January through March. Outflow of the lake into the Connecticut River is controlled via the Second Lake Dam, located near U.S. Route 3 at the southwestern shore. Third Connecticut Lake Third Connecticut Lake, at one time known as Lake St. Sophia, is a water body in the town of Pittsburg, situated northeast of the village center, and less than south of the Canadian border. It reaches a maximum depth of approximately , and sits higher in elevation than the second lake. Fish species include rainbow trout and lake trout. There is one public boat launch location, off of U.S. Route 3 along the eastern shore of the lake. Ice fishing is permitted from January through March. Fourth Connecticut Lake Fourth Connecticut Lake is the northernmost and most remote of the Connecticut Lakes; it is also the smallest, at . It is the source of the Connecticut River, and is situated in the town of Pittsburg, upstream from and higher than Third Connecticut Lake. The fourth lake is immediately to the northwest of the third lake. The Fourth Connecticut Lake Trail leads hikers to the lake. Fourth Connecticut Lake Trail The Fourth Connecticut Lake Trail is a public trail maintained by The Nature Conservancy that criss-crosses the international border between New Hampshire and Quebec for ending with a loop around the Fourth Connecticut Lake. It is one of the few international trails in North America. The land surrounding the lake is owned by The Nature Conservancy. The parking area for hikers is at the American facility of the Pittsburg–Chartierville Border Crossing, located north of the Pittsburg town center via U.S. Route 3. The trail begins about to the right of the American building, with a small kiosk at the trailhead. The trail has no cell phone coverage, requires some non-technical climbing, and starts at a good elevation—hikers should be prepared, even in summer. Pets are not allowed on the trail, and no camping, hunting, or fishing is allowed. For persons starting in the United States, passports are not needed to hike the trail, as even though parts of the trail are in Canada, the trail starts and ends on the American side of the international border. For persons starting in Canada, a