Larwill Lake
depth
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Depth scale
Survey readout
Larwill Lake is mapped to a depth of 35 ft on the Indiana DNR survey and covers about 11 acres in Whitley County, Indiana. Depths come from the Indiana DNR survey of 2019.
Measured from the Indiana DNR lake bathymetry survey.
- Deepest mapped contour
- 35 ft
- Survey year
- 2019
- Surface area
- 11 acres
- Shoreline
- 0.49 mi · lobed
- Aquatic vegetation
- 0% of surface · NDVI estimate
- Public access
- No public DNR launch identified
Additional depth details7 contours
- Contour depths
- 0–35 ft
- Recorded point soundings
- 35 ft
Provenance
Sources: IN DNR Lake Bathymetry, USGS 3DEP, USDA NAIP (public domain), OpenStreetMap (ODbL).
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Map details & sources4 sources
All layers registered to one bounding box; positions in WGS 84.
Survey-derived depth contours drape over USGS 3DEP elevation, with a USDA NAIP aerial basemap and OpenStreetMap shoreline. Color shows surveyed depth; dark lines are the survey's own isobaths.
- Coordinates
- 41.17284, -85.62318
- IN DNR lake ID
- 35033321
- Vertical exaggeration
- 2.49× below the waterline; land at true scale
- Basemap
- USDA NAIP · public domain
- Model size
- 0.5 MB
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-21Larwill Lake has a substantially developed setting, well sheltered geometry, nearby higher-volume roads. No special watercraft restriction is identified in the current source.
Why this score?5 components
Included in the index
| Component | Rating | Points of weight | Measurement |
|---|---|---|---|
| Natural setting | Modest | 2.2 of 35 | 10% natural land cover within 150 m of shore (2% forest, 8% wetland; 10% developed) |
| Geometric wind exposure | Excellent | 29.4 of 29 | mean fetch 253 m · 100% of sampled water within 500 m of shelter · short fetch in most directions |
| Watercraft controls | None identified | 8.8 of 18 | No special watercraft restriction identified in the current DNR source. Motors permitted, subject to general law. |
| Public access | Not listed | — | No DNR-listed access site. Township, county and road-end launches are not in this source, so this is not evidence that access is poor — the component is excluded and the remaining weights are renormalized. |
| Road isolation | Mixed | 5.9 of 18 | nearby higher-volume roads · 14 INDOT-classified segments within 1.2 km, peak 26,280 vehicles/day |
Additional paddling considerations
These describe the lake but are not part of the v1 Paddling Index and do not change the number above.
- Wake sensitivity
- Moderate — narrow in places — wakes would carry across parts of the lake
- Aquatic vegetation
- Low — approximately 0% mapped coverage · NAIP aerial imagery (NDVI)
- Observed motorized activity
- Unknown — No lake-level measurement of boat traffic is available. Legal permission to operate motors is not evidence of use.
- Wildlife habitat potential
- Limited — 2% forest and 8% wetland cover within 150 m of shore
Compare Indiana lakes by Paddling Index →
Non-native species records
No non-native species recorded in the available dataset. This does not confirm that no non-native species are present.
Source: Midwest Glacial Lakes Partnership Conservation Planner; underlying nonindigenous species records from the USGS Nonindigenous Aquatic Species database.
Larwill Lake — common questions
How deep is Larwill Lake?
The deepest contour on the Indiana DNR bathymetric survey of Larwill Lake is 35 ft. That is the deepest depth the historical survey map records, which may differ from the deepest point of the lake itself.
How big is Larwill Lake?
Larwill Lake covers about 11 acres in Whitley County, Indiana.
Is there public access to Larwill Lake?
No public launch for Larwill Lake is shown in the Indiana DNR's public access data. That is not the same as the lake being private -- municipal and private ramps are not in that source.
