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Indiana lake depth maps

Loon Lake depth map

Loon Lake in Warrick County, Indiana reaches a depth of 65 feet. Loon Lake is charted here across 13 closed depth contours, from the 5 ft line down to 65 ft, enclosing about 136 acres of water. Half of that water lies inside the 20 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

Loon Lake depth chart: 13 depth contours from 5 to 65 ft

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

Loon Lake depth chart data: water enclosed by each contour
Depth contourWater inside itShare of mapped water
5 ft136 acres100%
10 ft93 acres68%
15 ft70 acres51%
20 ft57 acres42%
25 ft48 acres35%
30 ft39 acres29%
35 ft33 acres25%
40 ft25 acres18%
45 ft22 acres16%
50 ft17 acres13%
55 ft11 acres8.4%
60 ft4.2 acres3.1%
65 ftunder 1 acreunder 1%

Acreages are computed from the closed Indiana DNR Lake Bathymetry contour rings, with islands subtracted. Shares are of the 136 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 Loon Lake: a wide shallow flat over a deep hole

Inside its outermost 5 ft contour the survey charts about 136 acres of Loon Lake, with the 20 ft line enclosing half of it, so the bulk of this Warrick County water sits on a shallow flat, with the real depth packed into one part of the basin. The sharpest change on the chart is between 5 and 10 ft, where the mapped water loses 43 acres in 5 ft of depth, that band is the contour to work first, because it is where the bottom stops being flat. Inside the 65 ft contour there is under an acre of water, toward the western side of the lake: a single pocket rather than a basin, and worth a drift over in high summer. 65 ft of water makes this a two-story fishery: warm-water fish hold the 5-to-20 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.

Loon Lake depth map FAQs

How deep is Loon Lake?
Loon Lake reaches a maximum depth of 65 feet in the Indiana DNR Lake Bathymetry survey. Most of it is far shallower: the survey charts 13 closed depth contours over about 136 acres, and half of that water sits inside the 20 ft line.
Where is the deepest part of Loon Lake?
The deepest charted water on Loon Lake lies inside the 65 ft contour, toward the western side 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 Loon Lake is shallower than 20 feet?
About half. The 20 ft contour encloses 57 acres of the roughly 136 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 43 acres.
How accurate is this Loon 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 Loon Lake

Mapped fishing venues near Loon Lake

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

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