StrikeTracks

Pond · Groton, Middlesex, Massachusetts

Knops Pond / Lost Lake

Back to all lakesSource Information (opens in a new tab)Regulations (opens in a new tab)

Browse Lakes

Location Snapshot

Knops Pond / Lost Lake is a northeastern Massachusetts lake system combining seasonal trout stocking with established bass water. The principal supported target is rainbow trout, with brown trout and largemouth bass providing additional species variety within the same fishery.

Information Only

StrikeTracks does not currently provide a live condition rating for this destination. Destination and fishery information is still available.

Weather Near Lake

Loading weather…

Fishery Profile

Documented species you may encounter at Knops Pond / Lost Lake.

High confidenceLast verified: Jul 11, 2026

Species images are AI-generated illustrations for visual reference and may simplify natural variation. Fishery records are based on the cited agency sources. About fish illustrations

Fishery overview

Knops Pond / Lost Lake in Groton mixes stocked trout with established largemouth bass. Rainbow trout are the main fish and are stocked in spring and fall. Brown trout are common and are stocked in spring and fall as well. Largemouth bass are common and already established. The pond covers 217 acres.

Target species

  • Rainbow Trout

    Oncorhynchus mykiss

    Expectation
    Primary
    Population
    Stocked
    Native status
    introduced
    Confidence
    High confidence
    Stocked · Spring, FallSpring, Fall

    Source: MassWildlife

  • Brown Trout

    Salmo trutta

    Expectation
    Common
    Population
    Stocked
    Native status
    introduced
    Confidence
    High confidence
    Stocked · Spring, FallSpring, Fall

    Source: MassWildlife

  • Largemouth Bass

    Micropterus nigricans

    Expectation
    Common
    Population
    Established
    Native status
    introduced
    Confidence
    High confidence

    Source: MassWildlife

Fishery characteristics

Composition
Mixed wild and stocked

Best seasons

  • Spring
  • Summer
  • Fall

Common techniques

  • Boat fishing
  • Fly fishing
  • Shore fishing
  • Spinning

Stocking information

Brown trout and rainbow trout are stocked in Knops Pond / Lost Lake in spring and fall.

  • Rainbow Trout

    Stocked · MassWildlife

    Stocked · Spring, Fall

  • Brown Trout

    Stocked · MassWildlife

    Stocked · Spring, Fall

Official sources

Hatch Match

No destination-specific hatch data is currently available.

General fly suggestions

  • Midge larvaGeneral stillwater midge-style family — not a live Chironomidae Hatch claim.
  • Woolly-bugger-style streamerGeneral stillwater streamer family. Not a baitfish or kokanee Hatch event.
  • Ant or beetleGeneral shoreline terrestrial family — not a local Hatch calendar.

These are general fishing suggestions, not a report of insects currently hatching at this destination.

Location and Access

Cataloged lake location

Groton, Middlesex, Massachusetts

Loading map…
Get Directions to Map Location (opens in a new tab)View Official Access Information (opens in a new tab)

The map marker represents the cataloged waterbody or monitoring location and may not indicate legal parking or public access. Confirm access through the official information before visiting.

Lake Details

Town

Groton

County

Middlesex

Surface Area

217 acres

Target Species

Trout, Largemouth Bass, Panfish

Public Access

Public

Boat Launch

Available