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Indiana lake depth maps

1000 Islands Lake depth map

1000 Islands Lake in Greene County, Indiana reaches a depth of 45 feet. 1000 Islands Lake is charted here across 9 closed depth contours, from the 5 ft line down to 45 ft, enclosing about 14 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

1000 Islands Lake depth chart: 9 depth contours from 5 to 45 ft

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

1000 Islands Lake depth chart data: water enclosed by each contour
Depth contourWater inside itShare of mapped water
5 ft14 acres100%
10 ft9.4 acres66%
15 ft7.3 acres51%
20 ft5.7 acres40%
25 ft4.3 acres30%
30 ft2.9 acres20%
35 ft1.5 acres11%
40 ftunder 1 acre6.1%
45 ftunder 1 acreunder 1%

Acreages are computed from the closed Indiana DNR Lake Bathymetry contour rings, with islands subtracted. Shares are of the 14 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 1000 Islands Lake: an evenly graded bottom

The survey encloses about 14 acres of 1000 Islands Lake inside its 5 ft contour, and half of that water lies inside the 20 ft line, so the bottom loses depth gradually and evenly, with no broad shelf and no single abrupt drop. Between 5 and 10 ft the mapped water sheds 4.6 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. Inside the 45 ft contour there is under an acre of water, toward the southwestern corner of the lake: a single pocket rather than a basin, and worth a drift over in high summer. Nothing here reaches a true cold-water layer at 45 ft, so structure does the thermocline's work: the points and inside turns where the 5 and 10 ft lines pinch together fish hardest in early season, and again as fish follow bait back down in autumn.

1000 Islands Lake depth map FAQs

How deep is 1000 Islands Lake?
1000 Islands Lake reaches a maximum depth of 45 feet in the Indiana DNR Lake Bathymetry survey. Most of it is far shallower: the survey charts 9 closed depth contours over about 14 acres, and half of that water sits inside the 20 ft line.
Where is the deepest part of 1000 Islands Lake?
The deepest charted water on 1000 Islands Lake lies inside the 45 ft contour, toward the southwestern 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 1000 Islands Lake is shallower than 20 feet?
About half. The 20 ft contour encloses 5.7 acres of the roughly 14 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 4.6 acres.
How accurate is this 1000 Islands 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 1000 Islands Lake

Mapped fishing venues near 1000 Islands Lake

1000 Islands 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