How deep is Blue Lake?

Blue Lake is more than 80 feet deep. The deepest contour in the Michigan DNR Inland Lake Contours survey is the 80 foot line, and the lake continues deeper inside it.

Where is the deepest part of Blue Lake?

The deepest charted water on Blue Lake lies inside the 80 ft contour, toward the northwestern corner of the lake. That contour encloses 10 acres, 8.8% 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 Blue Lake is shallower than 50 feet?

About half. The 50 ft contour encloses 49 acres of the roughly 117 acres inside the outer 5 ft line, so the other half of the water is shallower than 50 feet. The sharpest drop is between 5 and 10 feet, where the mapped water sheds 30 acres.

How accurate is this Blue 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

Blue Lake depth map

Blue Lake in Kalkaska County, Michigan reaches a depth of more than 80 feet at its deepest surveyed contour. Blue Lake is charted here across 9 closed depth contours, from the 5 ft line down to 80 ft, enclosing about 117 acres of water. Half of that water lies inside the 50 ft line, and only 10 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

Blue Lake depth chart: 9 depth contours from 5 to 80 ft

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

Blue Lake depth chart data: water enclosed by each contour
Depth contour	Water inside it	Share of mapped water
5 ft	117 acres	100%
10 ft	87 acres	74%
20 ft	74 acres	63%
30 ft	66 acres	57%
40 ft	59 acres	50%
50 ft	49 acres	42%
60 ft	38 acres	32%
70 ft	26 acres	23%
80 ft	10 acres	8.8%

Acreages are computed from the closed Michigan DNR Inland Lake Contours contour rings, with islands subtracted. Shares are of the 117 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 Blue Lake: steep walls and a big basin

Inside its outermost 5 ft contour the survey charts about 117 acres of Blue Lake, with the 50 ft line enclosing half of it, so depth comes quickly here, with no long shallow margin before the bottom drops away. The sharpest change on the chart is between 5 and 10 ft, where the mapped water loses 30 acres in 5 ft of depth, that band is the contour to work first, because it is where the bottom stops being flat. The deepest 80 ft contour holds 10 acres, 8.8% of the mapped water, toward the northwestern corner of the lake. 80 ft of water makes this a two-story fishery: warm-water fish hold the 5-to-50 ft ground while the basin can stay cold below the summer thermocline, and the traffic between the two runs along the 5–10 ft break at first and last light.

Ice fishing on Blue Lake

Blue Lake freezes later and less evenly than the shallow waters around it, and the winter bite sets up on the first real break rather than out over the 80 ft hole. The 5–10 ft band on the chart above is that edge: 30 acres of bottom tilt away there, and panfish and walleye slide up and down it through the day. Late ice pushes fish back onto the 5-to-50 ft flat. Check ice thickness locally before you walk out.

Blue Lake depth map FAQs

How deep is Blue Lake?: Blue Lake is more than 80 feet deep. The deepest contour in the Michigan DNR Inland Lake Contours survey is the 80 foot line, and the lake continues deeper inside it.
Where is the deepest part of Blue Lake?: The deepest charted water on Blue Lake lies inside the 80 ft contour, toward the northwestern corner of the lake. That contour encloses 10 acres, 8.8% 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 Blue Lake is shallower than 50 feet?: About half. The 50 ft contour encloses 49 acres of the roughly 117 acres inside the outer 5 ft line, so the other half of the water is shallower than 50 feet. The sharpest drop is between 5 and 10 feet, where the mapped water sheds 30 acres.
How accurate is this Blue 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 Blue Lake

Twin Lake depth map · 80+ ft max · 4 mi away
Big Bradford Lake depth map · 102 ft max · 10 mi away
Heart Lake depth map · 123 ft max · 11 mi away
Lake Margrethe depth map · 65 ft max · 12 mi away
Green Lake depth map · 57 ft max · 13 mi away

Mapped fishing venues near Blue Lake

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

Twin Lake · 4 mi away
Big Bradford Lake · 10 mi away
Heart Lake · 11 mi away

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