How deep is Bat Lake?

Bat Lake reaches a maximum depth of 70 feet in the Michigan DNR Inland Lake Contours survey. Most of it is far shallower: the survey charts 14 closed depth contours over about 64 acres, and half of that water sits inside the 20 ft line.

Where is the deepest part of Bat Lake?

The deepest charted water on Bat Lake lies inside the 70 ft contour, toward the middle of the lake. That contour encloses 1.4 acres, 2.2% of the mapped water, so it is a small target on a small water, the depth chart above gives the contour to line up on.

How much of Bat Lake is shallower than 20 feet?

About half. The 20 ft contour encloses 25 acres of the roughly 64 acres inside the outer 5 ft line, so the other half of the water is shallower than 20 feet. The sharpest drop is between 5 and 10 feet, where the mapped water sheds 14 acres.

How accurate is this Bat Lake depth map?

The contours come from the Michigan DNR Inland Lake Contours survey, retrieved August 2026 and last rebuilt on August 19, 2026. Depths change over time with water levels and sediment, so treat this map as a planning guide for fishing, and never use it for navigation. Acreages are computed from the published contour geometry, not from a separate area survey, so read them as close approximations.

Michigan lake depth maps

Bat Lake depth map

Bat Lake in Marquette County, Michigan reaches a depth of 70 feet. Bat Lake is charted here across 14 closed depth contours, from the 5 ft line down to 70 ft, enclosing about 64 acres of water. Half of that water lies inside the 20 ft line, and only 1.4 acres lie inside the deepest one. Every contour is on the interactive map below, free and without an account.

Data: Michigan DNR Inland Lake Contours (public record). Contours closed, checked and area-computed by Jordan Carter, founder of GilledIt · page updated August 19, 2026

Bat Lake depth chart: 14 depth contours from 5 to 70 ft

Data: Michigan DNR Inland Lake Contours (public record), retrieved August 2026 · depths change over time · not for navigation

Bat Lake depth chart data: water enclosed by each contour
Depth contour	Water inside it	Share of mapped water
5 ft	64 acres	100%
10 ft	50 acres	77%
15 ft	37 acres	57%
20 ft	25 acres	39%
25 ft	19 acres	29%
30 ft	16 acres	24%
35 ft	12 acres	19%
40 ft	9.2 acres	14%
45 ft	7.7 acres	12%
50 ft	6.1 acres	9.6%
55 ft	5 acres	7.9%
60 ft	3.9 acres	6.1%
65 ft	2.3 acres	3.6%
70 ft	1.4 acres	2.2%

Acreages are computed from the closed Michigan DNR Inland Lake Contours contour rings, with islands subtracted. Shares are of the 64 acres inside the outermost charted contour (the 5 ft line), which is the outer edge of the mapped water, several state files carry no 0 ft shoreline line, so this is not the same as a share of the lake's published surface area.

Fishing Bat Lake: a wide shallow flat over a deep hole

The survey encloses about 64 acres of Bat Lake inside its 5 ft contour, and half of that water lies inside the 20 ft line, so most of this Marquette County water is shallow and the depth is concentrated in one part of the basin. Between 5 and 10 ft the mapped water sheds 14 acres in 5 ft of depth, the sharpest change on the chart, start on that band, because it is where the bottom stops being flat. 1.4 acres, 2.2% of the mapped water, lie inside the deepest 70 ft contour, toward the middle of the lake. At 70 ft this is two-story water: the basin can stay cold below the summer thermocline while warm-water fish stay up on the 5-to-20 ft ground, and the fish that move between the two do it along the 5–10 ft break at first and last light.

Ice fishing on Bat Lake

Deep water like Bat Lake freezes later and less evenly than the shallow lakes around it, and the winter bite sets up on the first real break, not out over the 70 ft hole. That edge is the 5–10 ft band on the chart above, where 14 acres of bottom tilt away, and panfish and walleye work up and down it through the day. By late ice the fish push back onto the 5-to-20 ft flat. Check ice thickness locally before you walk out.

Bat Lake depth map FAQs

How deep is Bat Lake?: Bat Lake reaches a maximum depth of 70 feet in the Michigan DNR Inland Lake Contours survey. Most of it is far shallower: the survey charts 14 closed depth contours over about 64 acres, and half of that water sits inside the 20 ft line.
Where is the deepest part of Bat Lake?: The deepest charted water on Bat Lake lies inside the 70 ft contour, toward the middle of the lake. That contour encloses 1.4 acres, 2.2% of the mapped water, so it is a small target on a small water, the depth chart above gives the contour to line up on.
How much of Bat Lake is shallower than 20 feet?: About half. The 20 ft contour encloses 25 acres of the roughly 64 acres inside the outer 5 ft line, so the other half of the water is shallower than 20 feet. The sharpest drop is between 5 and 10 feet, where the mapped water sheds 14 acres.
How accurate is this Bat Lake depth map?: The contours come from the Michigan DNR Inland Lake Contours survey, retrieved August 2026 and last rebuilt on August 19, 2026. Depths change over time with water levels and sediment, so treat this map as a planning guide for fishing, and never use it for navigation. Acreages are computed from the published contour geometry, not from a separate area survey, so read them as close approximations.

Depth maps for lakes near Bat Lake

Witch Lake depth map · 95 ft max · 1 mi away
Squaw Lake depth map · 80 ft max · 2 mi away
Lake Michigamme depth map · 70 ft max · 16 mi away
Pickerel Lake depth map · 66 ft max · 17 mi away
Lake Angeline depth map · 162 ft max · 22 mi away

Mapped fishing venues near Bat Lake

Bat Lake in the venue directory covers access and fishing details for this water.

Witch Lake · 1 mi away
Squaw Lake · 2 mi away
Lake Michigamme · 16 mi away

Fishing in Michigan needs a state license: Michigan fishing license guide · all Michigan venues