How deep is Spear Lake?

Spear Lake reaches a maximum depth of 40 feet in the Indiana DNR Lake Bathymetry survey. Most of it is far shallower: the survey charts 8 closed depth contours over about 32 acres, and half of that water sits inside the 25 ft line.

Where is the deepest part of Spear Lake?

The deepest charted water on Spear Lake lies inside the 40 ft contour, toward the northwestern corner of the lake. That contour encloses under an acre, under 1% 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 Spear Lake is shallower than 25 feet?

About half. The 25 ft contour encloses 12 acres of the roughly 32 acres inside the outer 5 ft line, so the other half of the water is shallower than 25 feet. The sharpest drop is between 20 and 25 feet, where the mapped water sheds 11 acres.

How accurate is this Spear Lake depth map?

The contours come from the Indiana DNR Lake Bathymetry 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. Per Indiana DNR, the data are graphical representations for reference only, not a survey instrument. Acreages are computed from the published contour geometry, not from a separate area survey, so read them as close approximations.

Indiana lake depth maps

Spear Lake depth map

Spear Lake in Kosciusko County, Indiana reaches a depth of 40 feet. Spear Lake is charted here across 8 closed depth contours, from the 5 ft line down to 40 ft, enclosing about 32 acres of water. Half of that water lies inside the 25 ft line, and only under an acre lie inside the deepest one. Every contour is on the interactive map below, free and without an account.

Data: Indiana DNR Lake Bathymetry (credit: Indiana DNR). Contours closed, checked and area-computed by Jordan Carter, founder of GilledIt · page updated August 19, 2026

Spear Lake depth chart: 8 depth contours from 5 to 40 ft

Data: Indiana DNR Lake Bathymetry (credit: Indiana DNR), retrieved August 2026 · depths change over time · not for navigation

Spear Lake depth chart data: water enclosed by each contour
Depth contour	Water inside it	Share of mapped water
5 ft	32 acres	100%
10 ft	30 acres	93%
15 ft	28 acres	86%
20 ft	23 acres	72%
25 ft	12 acres	36%
30 ft	3.9 acres	12%
35 ft	1.2 acres	3.8%
40 ft	under 1 acre	under 1%

Acreages are computed from the closed Indiana DNR Lake Bathymetry contour rings, with islands subtracted. Shares are of the 32 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 Spear Lake: steep sides for its size

The survey encloses about 32 acres of Spear Lake inside its 5 ft contour, and half of that water lies inside the 25 ft line, so the bottom holds its depth well out from the bank rather than tapering off a long shallow margin. Between 20 and 25 ft the mapped water sheds 11 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. The 40 ft contour, toward the northwestern corner of the lake, encloses under an acre of water, a single pocket rather than a basin, but one worth a drift over in high summer. With 40 ft at its deepest there is no true cold-water layer here, so structure does the work the thermocline does elsewhere: fish the points and inside turns where the 20 and 25 ft lines pinch together, hardest in early season and again as fish follow bait back down in autumn.

Ice fishing on Spear Lake

Spear Lake's 40 ft is a workable ice depth, enough water to hold fish all winter, without the slow freeze-up of a big basin. First light belongs on the 40 ft hole, all 0.3 acres of it; as the sun gets up, move onto the 20–25 ft break, and spend the middle of the day on the flats inside the 25 ft line. Check ice thickness locally before you walk out.

Spear Lake depth map FAQs

How deep is Spear Lake?: Spear Lake reaches a maximum depth of 40 feet in the Indiana DNR Lake Bathymetry survey. Most of it is far shallower: the survey charts 8 closed depth contours over about 32 acres, and half of that water sits inside the 25 ft line.
Where is the deepest part of Spear Lake?: The deepest charted water on Spear Lake lies inside the 40 ft contour, toward the northwestern corner of the lake. That contour encloses under an acre, under 1% 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 Spear Lake is shallower than 25 feet?: About half. The 25 ft contour encloses 12 acres of the roughly 32 acres inside the outer 5 ft line, so the other half of the water is shallower than 25 feet. The sharpest drop is between 20 and 25 feet, where the mapped water sheds 11 acres.
How accurate is this Spear Lake depth map?: The contours come from the Indiana DNR Lake Bathymetry 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. Per Indiana DNR, the data are graphical representations for reference only, not a survey instrument. 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 Spear Lake

Shock Lake depth map · 60 ft max · 1 mi away
Village Lake depth map · 21 ft max · 2 mi away
Duely Lake depth map · 18 ft max · 2 mi away
Gordy Lake depth map · 30 ft max · 2 mi away
Lake Wawasee depth map · 75 ft max · 4 mi away

Mapped fishing venues near Spear Lake

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

Shock Lake · 1 mi away
Wawasee Public Fishing Area · 2 mi away
Village Lake · 2 mi away

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