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Uncanoonuc Lake

Goffstown, New Hampshire — NH Fish & Game Region 4 (Southwest NH).

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23Surface acres
10 ftMax depth
5 ftAverage depth
OligotrophicTrophic class (NHDES)
1Public access sites

Source: NH Fish & Game NH Freshwater Fishing Guide layer (2026; depth/area/trophic from NHDES). Depth map: NHFG bathymetry map (PDF).

Location & fast facts

Where Uncanoonuc Lake is in New Hampshire

The red circle marks Uncanoonuc Lake.

Fast facts

About Uncanoonuc Lake

  • County: Hillsborough
  • Town: Goffstown
  • Watershed: Merrimack River basin (NHDES)
  • Type: Artificial (dammed or man-made) (NHDES)
  • NH Fish & Game: Region 4 (Southwest NH)
  • Distance: about 15 mi from Concord, NH and 51 mi from Boston, straight-line (not driving distance)
  • Access (NHFG): Goffstown Beach residents only

Towns and counties: NHFG, NHDES and U.S. Census town boundaries (shore towns found by overlaying the lake outline).

Fishing in New Hampshire

  • 2026 fishing license: Resident $45 · Non-resident $63 · 1-day $10 / $15 NHFG
  • Kids: Under 16 fish free, no license needed NHFG
  • Free fishing days 2026: Sat Jan 17 & Sat Jun 6 (3rd Sat in Jan, 1st Sat in June) NH Digest
  • Lakes & ponds: Almost 1,000 public lakes and ponds NHDES
  • Buy a license: Online or at about 250 local license agents NHFG
  • Ice fishing: Most waters: ice-in to ice-out. Lake trout/salmon lakes: Jan 1–Mar 31, no keeping salmon. Trout ponds closed. Bob houses off by Apr 1 NH Digest
  • Regulations: 2026 NH Freshwater Fishing Digest

As of 2026-10-10. Check the official source before you go.

Plan your trip PLACEHOLDER AFFILIATE LINKS

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Lake map

Uncanoonuc Lake shoreline, boat launches & beaches

Goffstown Beach (Beach)11 mileN

Numbers on the map match the list at rightbelow.

Beach
  1. 1Goffstown Beach
    Beach · Goffstown

Shoreline: NHDES Lake Information Mapper lake outline (NH hydrography data). State outline: U.S. Census Bureau TIGERweb. Points: NH Access Sites to Public Waters (NH OPD / NHFG). Interactive map: Leaflet with © OpenStreetMap contributors. Not for navigation.

Conditions right now

Air temperature & conditions (nearest NWS station)Loading…
Fetching the latest National Weather Service observation…

Live from the National Weather Service API for the lake's coordinates (42.9890, -71.5804). The nearest station may be several miles away. NWS forecast for Uncanoonuc Lake. No live water-temperature sensor is shown because we haven't found a public one for this lake.

Sun, moon & best fishing times

Sun & moon at Uncanoonuc Lake

Best fishing times

Major periodMinor periodDaylight

    Based on solunar theory, an estimate. Major periods (about 2 hours) center on when the moon is directly overhead or underfoot; minor periods (about 1 hour) center on moonrise and moonset. The 0–100 activity score rises during those periods and gets a boost near sunrise and sunset and around the new and full moon. Weather, water temperature and pressure often matter more. Sun and moon times are calculated in your browser from the lake's coordinates with standard astronomy formulas, shown in ET (America/New_York), and accurate to within a few minutes.

    Fishing seasons & limits

    Statewide general rules Uncanoonuc Lake is not listed as a Lake Trout/Salmon Lake or Trout Pond in the 2026 Digest, so New Hampshire's general lake & pond rules apply.

    SpeciesSeason & limits (general rules)
    Black bassJan 1–May 14: 2/day · May 15–Jun 15: catch-and-release · Jun 16–Dec 31: 5/day
    TroutOpen water: 5 fish or 5 lb/day; through the ice: 2/day
    Perch, crappie, sunfish, horned poutNo closed season, 25/day each, 50 total
    Chain pickerelNo closed season, 10/day

    2026 NH Freshwater Fishing Digest: Lakes & Ponds General Rules · Lakes & Ponds with Special Rules

    Summary only. Check the current Digest before you fish. As of Oct 10, 2026.

    Boat launches & access sites

    1 public access site listed.

    SiteTownOwnerTypeParkingFeeUsesMap
    Goffstown BeachGoffstownTown - GoffstownBeach · Unimproved rampGravelNo feeFishing, Boating, Swimming, Picnic
    LWCF; Access: Limited
    42.9875, -71.5812

    NH Access Sites to Public Waters (NH OPD / NHFG)

    Fees, hours and rules change; confirm with the site owner before you go.

    Invasive species

    None documented NHDES lists no known invasive species in Uncanoonuc Lake.

    Clean, Drain, Dry is NH law. Drain your boat, live wells, bilges and gear when you leave any water, travel with drain plugs out (RSA 487:16-d), and don't carry plants or weeds on your boat, trailer or vehicle (RSA 487:16-c). NH LAKES Lake Host.

    NHDES Lake Information Mapper · RSA 487:16-d · RSA 487:16-c

    As of Oct 10, 2026.

    Safe to swim?

    Toxic algae (cyanobacteria): NHDES statusChecking NHDES…
    Live from the NHDES Healthy Swimming Mapper. NHDES issues warnings May 15–Oct 15.
    Beach bacteria testingNot state-tested
    NHDES: Does not participate in NHDES' Public Beach Inspection Program.

    Check before you swim: the NHDES Healthy Swimming Mapper is updated daily. If you see a bloom, stay out of the water, keep pets out, and report it to NHDES.

    Water quality

    Trophic classOligotrophic (clear, low-nutrient)
    Water quality classClass A (NH surface water classification)
    NHDES lake surveys1985
    Fish consumptionNHDES mercury report for Uncanoonuc Lake

    NHDES Lake Information Mapper

    Contact & official info

    More trip ideas PLACEHOLDER AFFILIATE LINKS

    Lakes & ponds nearby

    Straight-line distance between lake centers. All New Hampshire lakes & ponds · All waters in Goffstown