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From Wikipedia, the free encyclopedia

Mascoma Lake
Mascoma Lake, February 2005
Location of Mascoma Lake in New Hampshire, USA.
Location of Mascoma Lake in New Hampshire, USA.
Mascoma Lake
Location of Mascoma Lake in New Hampshire, USA.
Location of Mascoma Lake in New Hampshire, USA.
Mascoma Lake
LocationGrafton County, New Hampshire
Coordinates43°37′20″N 72°8′27″W / 43.62222°N 72.14083°W / 43.62222; -72.14083
Primary inflowsMascoma River; Knox River
Primary outflowsMascoma River
Basin countriesUnited States
Max. length4.2 mi (6.8 km)
Max. width0.7 mi (1.1 km)
Surface area1,165 acres (4.71 km2)
Average depth30 ft (9.1 m)
Max. depth68 ft (21 m)
Surface elevation228 m (748 ft)
IslandsWood Island; Relhan Island; North Island
SettlementsEnfield; Lebanon (village of Mascoma)
MASCOMA LAKE, ENFIELD, N.H.; ca. 1906; Enfield Shaker Museum

Mascoma Lake is a 1,158-acre (469 ha)[1] lake in western New Hampshire, United States. Most of the lake is within the town of Enfield, while a small portion is within the city of Lebanon, where it drains into the Mascoma River, a tributary of the Connecticut River.

The lake's general trend is from southeast to northwest, with the outlet at the northwestern end. The Mascoma River enters the lake near its halfway point, from the northeastern side, at the town center of Enfield. The southeastern end of the lake is fed by the Knox River. The lake's average depth is 30 feet (9.1 m) with a maximum depth of 68 feet (21 m).[1]

The lake freezes during winter and is stable enough to be walked upon. Ice fishing is popular on the lake. The lake is stocked with trout by the New Hampshire Fish and Game Department.

Mascoma Lake often has a spring cyanobacteria bloom. Recent studies suggest that significant exposure to high levels of cyanobacteria producing toxins such as BMAA can cause amyotrophic lateral sclerosis (ALS). People living within half a mile of cyanobacterially contaminated lakes have had a 2.3 times greater risk of developing ALS than the rest of the population; people around Lake Mascoma had an up to 25 times greater risk of ALS than the expected incidence.[2]

In June 2009 the State of New Hampshire discouraged people from recreation in some areas of the lake because of the bloom.[3] Aside from the bloom, the lake is generally considered safe for swimming,[citation needed] and the town of Enfield maintains a public beach with a lifeguard on the lake.

NASA and its partners have used the frozen lake to test a robotic rover as a simulation of Antarctica.[4]

Mascoma Lake is home to the Dartmouth College sailing team. A community sailing club called the Mascoma Sailing Club[5] also uses the lake.

See also


  1. ^ a b "Mascoma Lake, Enfield, Lebanon" (PDF). NH Fish & Game. Retrieved September 2, 2014.
  2. ^ Caller TA, Doolin JW, Haney JF, Murby AJ, West KG, Farrar HE, Ball A, Harris BT, Stommel EW (2009). "A cluster of amyotrophic lateral sclerosis in New Hampshire: a possible role for toxic cyanobacteria blooms". Amyotrophic Lateral Sclerosis. 10 (Suppl 2): 101–08. doi:10.3109/17482960903278485. PMID 19929741. S2CID 35250897.
  3. ^ State Issues Cyanobacteria Warning for Mascoma Lake
  4. ^ "Researchers Deploy Robot on Frozen Lake in Preparation for Antarctic Expedition".
  5. ^ Mascoma Sailing Club
This page was last edited on 14 October 2022, at 13:49
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