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Elm Brook Pool

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

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150Surface acres
25 ftMax depth
8 ftAverage depth
MesotrophicTrophic class (NHDES)
WarmwaterFishery type

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 Elm Brook Pool is in New Hampshire

The red circle marks Elm Brook Pool.

Fast facts

About Elm Brook Pool

  • County: Merrimack
  • Town: Hopkinton
  • NH Fish & Game: Region 4 (Southwest NH)
  • Distance: about 10 mi from Concord, NH and 66 mi from Boston, straight-line (not driving distance)
  • Getting there (NHFG): Hopkinton-Everett Flood Ctrl, Rt 127 to Elm Brook Pk
  • Access (NHFG): Elm Brook Park

Towns and counties: NHFG, NHDES and U.S. Census town boundaries.

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.

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 (43.1846, -71.7277). The nearest station may be several miles away. NWS forecast for Elm Brook Pool. 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 Elm Brook Pool

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.

    Fish you can catch

    Largemouth bassChain pickerelBrown bullhead (horned pout)Black crappieBluegillPumpkinseed (common sunfish)Yellow perch

    Species list from NHFG Fishing Guide codes: LMB, ECP, BBH, BC, BG, CSF, YP (names decoded by us; NHFG does not publish the legend with the layer). NHFG fishery type: Warmwater.

    NHFG NH Freshwater Fishing Guide layer

    Fishing seasons & limits

    Statewide general rules Elm Brook Pool 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 to the species found here.

    SpeciesSeason & limits (general rules)
    Black bassJan 1–May 14: 2/day · May 15–Jun 15: catch-and-release, artificial lures & flies only · Jun 16–Dec 31: 5/day
    Chain pickerelno closed season, 10/day
    Perch, crappie, sunfish & horned poutno closed season, 25/day each, 50 total

    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.

    Contact & official info

    Lakes & ponds nearby

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