How deep is Spear Lake?

Spear Lake reaches a maximum depth of 40 feet, according to the Indiana DNR Lake Bathymetry survey. Most of the lake is shallower, with 8 mapped depth bands between the shoreline and the deepest hole.

Where is the deepest part of Spear Lake?

The deepest surveyed water on Spear Lake sits toward the northwestern corner of the lake, inside the 40 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.

How accurate is this Spear Lake depth map?

The contours come from the Indiana DNR Lake Bathymetry survey. 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.

Indiana lake depth maps

Spear Lake depth map

Spear Lake in KOSCIUSCO County, Indiana reaches a depth of 40 feet. The official Indiana survey maps 8 depth bands across 12 contour lines. This free map of Spear Lake shows every surveyed contour as an interactive depth chart you can use to plan a session before you travel.

Spear Lake depth chart: 8 depth bands 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
Depth contour	Share of mapped area inside it
5 ft	about 100%
10 ft	about 93%
15 ft	about 86%
20 ft	about 72%
25 ft	about 36%
30 ft	about 12%
35 ft	about 4%
40 ft	under 1%

Share of the surveyed surface area enclosed by each depth contour, computed from the Indiana DNR Lake Bathymetry data.

How to fish Spear Lake: mid-depth structure water

With 40 feet at its deepest, the fish-holding structure is the mid-depth contour: drop-offs, points and inside turns between the shallows and the basin. Use the 8 mapped depth bands to find where contour lines pinch together, which marks the sharpest breaks, and work those edges first, especially early season and again in the fall as fish follow bait between depths.

Ice fishing on Spear Lake

Spear Lake is a classic ice-fishing depth: enough water to hold fish all winter without the long freeze-up of a deep basin. Start on the deepest mapped hole at first light, then work the breaks where contour lines tighten. Mid-depth flats near the basin edge produce through midday. Always verify ice thickness locally before walking out.

Spear Lake depth map FAQs

How deep is Spear Lake?: Spear Lake reaches a maximum depth of 40 feet, according to the Indiana DNR Lake Bathymetry survey. Most of the lake is shallower, with 8 mapped depth bands between the shoreline and the deepest hole.
Where is the deepest part of Spear Lake?: The deepest surveyed water on Spear Lake sits toward the northwestern corner of the lake, inside the 40 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.
How accurate is this Spear Lake depth map?: The contours come from the Indiana DNR Lake Bathymetry survey. 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.

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: US fishing license guide · all Indiana venues