Portsmouth Mine

Details

DNR lake ID

18043700

County

Crow Wing

Surface area

149 acres

Maximum depth

395 feet

Shoreline

3.1 miles

Average water clarity

30.5 feet (Secchi disk, 3 readings)

Nearest town (DNR)

Armour Number Two Mine

Latest DNR fish survey

July 2022, standard survey

Surveys on record

3, since 2010

Game fish caught in the 2022 survey

bluegill 77, rock bass 28, pumpkinseed 18, largemouth bass 15, northern pike 11, yellow perch 7, rainbow trout 5, hybrid sunfish 4

Fish species recorded

black crappie, bluegill, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, rainbow trout, rock bass, yellow perch, and 1 other species

Stocked in 2025

rainbow trout yearlings (7,500); rainbow trout adults (66)

Stocked in 2024

rainbow trout yearlings (7,000)

Stocked in 2023

rainbow trout adults (92); rainbow trout yearlings (7,000)

Stocking years on record

10 of the last 10 (2016 to 2025)

Portsmouth Pit Public Water Access Site

trailer launch, concrete slab ramp, 1 dock, 8 trailer spaces, toilet, run by DNR Division of Parks and Trails

Fish consumption

Follow the statewide guidelines; fish from this lake have been tested

Size

100 to 499 acres

Deepest point

60 feet or more

Public access

Yes

Stocked in the last 3 years

Yes

Sources

• Minnesota DNR LakeFinder
  Checked September 24, 2026
• Minnesota DNR Public Water Access Sites
  Checked September 24, 2026

Survey catches show what DNR nets and electrofishing found on the survey date, not how the fishing is today. Check the current regulations and the Department of Health advice before you keep fish, and confirm access conditions before you tow a boat.