Third Connecticut Lake

Nestled in the mountains by the US / Canadian border you’ll find Third Connecticut Lake in Pittsburg NH. Third in a chain of lakes running numerically south to north, Third Connecticut is the third largest of the four Connecticut Lakes. Third Connecticut Lake is located twenty miles north of the village of Pittsburg NH. North of the 45th Parallel, the glacial lake reaches depths of more than 110′.

Third-Lake-PostcardAnglers come to the area to fish the deep waters for rainbow trout and lake trout in warmer months and to fish for rainbow trout, cusk and lake trout in winter. Third Lake is home to nesting pairs of loons.

Fishing Regulations

Rainbow Trout – Fish for rainbow trout from January 1 until September 30.  Daily limit is five fish or five pounds whichever comes first with no length limit.

Lake Trout – Fish for lake trout from January 1 until September 30. 2 fish daily limit. Minimum length 18 inches. Daily bag limit for lake trout is 2 fish.

Ice Fishing

Ice fishing is permitted on the lake from January 1 thru March 31. Only two trap (lines) are permitted be angler. Daily bag limit for lake trout is 2 fish and the minimum length is 18 inches. The daily bag limit for brook trout is five fish or five pounds, whichever is reached first. There is no length minimum or daily limit for cusk. For more on fishing Third Connecticut Lake. Visit NH Fish and Game for more information on fishing the Connecticut Lakes Region.

Boat Launches on Third Connecticut Lake

There is one boat launch on Third Connecticut Lake in Pittsburg.

  • There is a gravel launch just off US Rte 3.  There is ample parking for vehicles and trailers.

Boating Regulations

Persons 16 years old and older who operate a motorboat over 25 hp or a ski craft in New Hampshire must have a boating education certificate.


  • Surface elevation: 2,188′
  • Area:  231 acres
  • Outflow: Connecticut River
  • Inflow source: Connecticut River
  • Cities: Pittsburg

Depth Contour Chart

Third Connecticut Lake Map


Third Connecticut Lake Video

Know the Difference: Salmon and Brown Trout