How deep is South Twin Lake?

South Twin Lake reaches a maximum depth of 50 feet, according to the Indiana DNR Lake Bathymetry survey. Most of the lake is shallower, with 10 mapped depth bands between the shoreline and the deepest hole.

Where is the deepest part of South Twin Lake?

The deepest surveyed water on South Twin Lake sits toward the northeastern corner of the lake, inside the 50 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.

How accurate is this South Twin 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

South Twin Lake depth map

South Twin Lake in LAGRANGE County, Indiana reaches a depth of 50 feet. The official Indiana survey maps 10 depth bands across 10 contour lines. This free map of South Twin Lake shows every surveyed contour as an interactive depth chart you can use to plan a session before you travel.

South Twin Lake depth chart: 10 depth bands to 50 ft

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

South Twin Lake depth chart data
Depth contour	Share of mapped area inside it
5 ft	about 100%
10 ft	about 93%
15 ft	about 90%
20 ft	about 86%
25 ft	about 82%
30 ft	about 75%
35 ft	about 66%
40 ft	about 56%
45 ft	about 43%
50 ft	about 12%

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

How to fish South Twin Lake: mid-depth structure water

With 50 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 10 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 South Twin Lake

South Twin 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.

South Twin Lake depth map FAQs

How deep is South Twin Lake?: South Twin Lake reaches a maximum depth of 50 feet, according to the Indiana DNR Lake Bathymetry survey. Most of the lake is shallower, with 10 mapped depth bands between the shoreline and the deepest hole.
Where is the deepest part of South Twin Lake?: The deepest surveyed water on South Twin Lake sits toward the northeastern corner of the lake, inside the 50 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.
How accurate is this South Twin 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 South Twin Lake

North Twin Lake depth map · 35 ft max · 1 mi away
Fish Lake depth map · 70 ft max · 9 mi away
Cass Lake depth map · 21 ft max · 9 mi away
Emma Lake depth map · 30 ft max · 9 mi away
Royer Lake depth map · 50 ft max · 10 mi away

Mapped fishing venues near South Twin Lake

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

North Twin Lake · 1 mi away
Meteer Lake Fishing Boat Access · 5 mi away
Fish Lake · 9 mi away

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