Lake Gratiot fishing: Rainbow Trout, Walleye, Brook Trout

Target species: Rainbow Trout, Walleye, Brook Trout, Smallmouth Bass
Boat: 1 ramp or launch on file for this water.
Start here: Launch at Gratiot Lake, 1 lane.

The lake

Lake Gratiot covers 1,465 acres in Michigan, across Keweenaw County. It is a lake: 93% of it is 60 feet deep or less; the deepest point measured is at least 70 feet (21.3 m). Our records hold 4 species for this water.

Depth and bottom

Deepest measured point: at least 70 ft (21.3 m). That is the deepest contour line: the bottom goes deeper. 93% of the water is 60 feet or shallower. We hold 66 depth contour lines for this water.

  • 0–5 ft: 4.1% of the water
  • 5–10 ft: 6% of the water
  • 10–15 ft: 5.1% of the water
  • 15–20 ft: 4.7% of the water
  • 20–25 ft: 5.1% of the water
  • 25–30 ft: 5.7% of the water
  • 30–35 ft: 6.6% of the water
  • 35–40 ft: 8% of the water
  • 40–45 ft: 10.9% of the water
  • 45–50 ft: 23.4% of the water
  • 50–55 ft: 10.2% of the water
  • 55–60 ft: 3.2% of the water
  • 60–65 ft: 2.1% of the water
  • 65–70 ft: 5.2% of the water

4 target fish, led by Rainbow Trout

  • Rainbow Trout — Feeding water: 50–65°F.
  • Walleye — Feeding water: 50–75°F.
  • Brook Trout — Feeding water: 50–65°F.
  • Smallmouth Bass — Feeding water: 60–75°F.

Stocking: 416,646 fish, 1979–2008

Michigan DNR records list 416,646 fish released into this water from 1979 to 2008. The latest stocking on record is from 2008, more than three years ago.

  • Walleye: 233,072 in 1985–2004
  • Rainbow Trout: 147,000 in 1985–1991
  • Brook Trout: 27,610 in 2006–2008
  • Smallmouth Bass: 214 in 1983

One more species on the stocking list.

Aerial imagery: USDA NAIP 2022
USDA Farm Service Agency, NAIP 2022 aerial imagery (USGS The National Map) · Public domain

1 ramp or launch on this water

On this water we hold 1 trailer ramp.

  • Gratiot Lake — 1 lane, restrooms. Fort Wilkins State Historic Park. phone 906-289-4215 · website mcgi.state.mi.us/mrbis/BASDetail.aspx?sid=A-42-002

The place listed has no fee or opening hours on file: a blank means we hold no such field, not that it is free or always open, and this list may not be complete.

Water and conditions

Water clarity runs 13–20 feet on our readings, averaging 17 feet, from 130 readings. These readings span 2017–2023.

What is hard here

Only 1 public ramp is on file, so the launch decides where you fish.

Where this data comes from

  • Michigan EGLE — Michigan EGLE: depth contours: class A, a survey of the bottom.
  • Webster, K.E., McCullough, I.M., Soranno, P.A. LAGOS-US DEPTH v1.0, EDI, doi:10.6073/pasta/64ddc4d04661d9aef4bd702dc5d8984f (CC BY 4.0); Cheruvelil et al. LAGOS-US LOCUS v1.0 (EDI) — LAGOS-US DEPTH v1.0: Lake depth for 17,675 lakes in the conterminous U.S.: class B, a depth figure measured and published by an agency, without a bottom map.