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Big Saint Germain Lake

By St. Germain. 1,622 acres, 42 feet at the deepest.

1,622acres
42 ftdeepest
21 ftaverage depth
1public boat landing

Ice on Big Saint Germain Lake

No ice reports from Big Saint Germain Lake in the last two weeks.

What folks saw out there, not the DNR. No ice is safe ice; check it yourself.

Send a report All ice reports

Fish

  • Common: musky, panfish, northern pike and walleye
  • Also there: largemouth bass, smallmouth bass and trout

How the DNR lists them. It doesn't say how the fishing is.

Boat landings

Water and bottom

  • Water: low
  • Bottom: 75% sand, 10% gravel, 5% rock, 10% muck
  • Kind of lake: a drainage lake: a stream runs in and out

Invasive species

The DNR has found banded mystery snail, Chinese mystery snail and rusty crayfish here.

State law: before you leave the landing, pull off any plants and critters, drain all the water out of your boat, motor, livewell and buckets, and never move live fish away from the lake.

The DNR's boat and bait rules

Depth map

Wisconsin DNR lake survey map of Big Saint Germain Lake, with depth lines in feet

Wisconsin DNR lake survey map, mapped July 1974. Mind the north arrow; some of these old maps are turned sideways. It's old and not for navigation; shorelines and depths change. The DNR lists the lake at 1,622 acres today. The DNR's original (PDF)

Lake facts from the Wisconsin DNR's page for Big Saint Germain Lake, checked October 24, 2026.