Fishmouth Lake

Details

DNR lake ID

69083400

County

St. Louis

Surface area

30 acres

Maximum depth

28 feet

Shallow water (littoral) area

20 acres, 66% of the lake

Shoreline

1.3 miles

Average water clarity

11.5 feet (Secchi disk, 1 readings)

Nearest town (DNR)

Kettle Falls

Latest DNR fish survey

July 2025, targeted survey

Surveys on record

2, since 2009

Game fish caught in the 2025 survey

yellow perch 35, northern pike 4

Fish species recorded

northern pike, yellow perch, and 4 other species

Public accesses (DNR survey record)

1, owned by National Park Service

Eating advice, general populations

northern pike: shorter than 22" - 1 serving/week; northern pike: 22" or longer - 1 serving/month

Size

Under 100 acres

Deepest point

15 to 29 feet

Public access

Yes

Lake-specific eating advice

Yes

Sources

• Minnesota DNR LakeFinder
  Checked September 24, 2026
• Minnesota Department of Health fish consumption guidelines
  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.