How deep is Olin Lake?

Olin Lake reaches a maximum depth of 70 feet, according to the Indiana DNR Lake Bathymetry survey. Most of the lake is shallower, with 7 mapped depth bands between the shoreline and the deepest hole.

Where is the deepest part of Olin Lake?

The deepest surveyed water on Olin Lake sits toward the southeastern corner of the lake, inside the 70 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.

How accurate is this Olin 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

Olin Lake depth map

Olin Lake in LAGRANGE County, Indiana reaches a depth of 70 feet. The official Indiana survey maps 7 depth bands across 9 contour lines. This free map of Olin Lake shows every surveyed contour as an interactive depth chart you can use to plan a session before you travel.

Olin Lake depth chart: 7 depth bands to 70 ft

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

Olin Lake depth chart data
Depth contour	Share of mapped area inside it
10 ft	about 100%
20 ft	about 91%
30 ft	about 80%
40 ft	about 62%
50 ft	about 43%
60 ft	about 25%
70 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 Olin Lake: deep, two-story water

At 70 feet, this is a two-story fishery: warm-water species work the shallows and weed edges while the deep basin can hold cold-water fish below the summer thermocline. In summer, target the transition where the bottom breaks from the shallow shelf toward the basin; fish suspend along that edge at dawn and dusk. The 7 mapped depth bands make it straightforward to find those breaks before you launch.

Ice fishing on Olin Lake

On deep water like Olin Lake, the winter bite concentrates along the first major drop-off rather than the deepest basin. Use the contours above to find where the shallow shelf breaks toward deep water and set up on that edge; panfish and walleye slide up and down it through the day. Late ice often pushes fish shallower again. Always verify ice thickness locally before walking out, and remember deep lakes freeze later and less evenly than shallow ones.

Olin Lake depth map FAQs

How deep is Olin Lake?: Olin Lake reaches a maximum depth of 70 feet, according to the Indiana DNR Lake Bathymetry survey. Most of the lake is shallower, with 7 mapped depth bands between the shoreline and the deepest hole.
Where is the deepest part of Olin Lake?: The deepest surveyed water on Olin Lake sits toward the southeastern corner of the lake, inside the 70 ft contour. The interactive depth map above shows the full basin outline and the breaks leading into it.
How accurate is this Olin 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 Olin Lake

Martin Lake depth map · 50 ft max · 0 mi away
Oliver Lake depth map · 80 ft max · 1 mi away
Dallas Lake depth map · 100 ft max · 2 mi away
Hackleburg Lake depth map · 35 ft max · 2 mi away
Witmer Lake depth map · 50 ft max · 2 mi away

Mapped fishing venues near Olin Lake

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

Martin Lake · 0 mi away
Oliver Lake · 1 mi away
Dallas Lake · 2 mi away

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