Lake Union

Details

DNR lake ID

86029800

County

Wright

Surface area

93 acres

Maximum depth

35 feet

Shallow water (littoral) area

27 acres, 29% of the lake

Shoreline

1.5 miles

Average water clarity

4.8 feet (Secchi disk, 3 readings)

Latest DNR fish survey

May 2022, targeted survey

Surveys on record

15, since 1972

Game fish caught in the 2022 survey

bluegill 878, black crappie 140, pumpkinseed 104, hybrid sunfish 9

Fish species recorded

black crappie, bluegill, channel catfish, green sunfish, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, walleye, yellow perch, and 9 other species

Union Lake Public Water Access Site

trailer launch, concrete slab ramp, 1 dock, 10 trailer spaces, run by DNR Division of Parks and Trails

Eating advice, sensitive populations

bullhead: all sizes - 1 serving/month

Eating advice, general populations

bullhead: all sizes - 2 servings/week; channel catfish: all sizes - 1 serving/month

Size

Under 100 acres

Deepest point

30 to 59 feet

Public access

Yes

Lake-specific eating advice

Yes

Sources

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