Boulder Lake

Details

DNR lake ID

38014000

County

Lake

Surface area

259 acres

Maximum depth

54 feet

Mean depth

14 feet

Shallow water (littoral) area

109 acres, 42% of the lake

Shoreline

6.1 miles

Average water clarity

9.0 feet (Secchi disk, 1 readings)

Nearest town (DNR)

Prairie Portage

Latest DNR fish survey

August 2025, targeted survey

Fish consumption

Follow the northeast guidelines; fish from this lake have not been tested

Size

100 to 499 acres

Deepest point

30 to 59 feet

Sources

• Minnesota DNR LakeFinder
  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.