Cobblestone Lake

Details

DNR lake ID

19045600

County

Dakota

Surface area

35 acres

Maximum depth

18 feet

Shoreline

1.3 miles

Average water clarity

6.3 feet (Secchi disk, 3 readings)

Nearest town (DNR)

Rosemount

Latest DNR fish survey

May 2025, standard survey

Surveys on record

5, since 2005

Game fish caught in the 2025 survey

bluegill 110, yellow perch 63, pumpkinseed 16, walleye 14, black crappie 5, hybrid sunfish 5, green sunfish 1

Fish species recorded

black crappie, bluegill, green sunfish, hybrid sunfish, largemouth bass, pumpkinseed, walleye, yellow perch, and 3 other species

Stocked in 2025

walleye yearlings (125); walleye adults (96); yellow perch adults (1,470)

Stocked in 2024

walleye yearlings (218)

Stocked in 2023

walleye fingerlings (800); walleye adults (61)

Stocking years on record

9 of the last 10 (2017 to 2025)

Infested waters list

Eurasian watermilfoil

Eating advice, general populations

sunfish: all sizes - 2 servings/week

Size

Under 100 acres

Deepest point

15 to 29 feet

Stocked in the last 3 years

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.