Rivir Lake
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Depth scale
Survey readout
Rivir Lake has a reported maximum depth of 36 ft, and covers about 31 acres in Noble County, Indiana. The Indiana DNR survey maps contours down to 35 ft; the depth between 35 ft and 36 ft is interpolated rather than measured. Depths come from the Indiana DNR survey of 2019.
Measured from the Indiana DNR lake bathymetry survey.
Depth below 35 ft is interpolated. The survey's own contours stop at 35 ft, while it reports a maximum of 36 ft. The basin between those two depths is inferred by the model, not measured — so the shape of the deep hole is an estimate, and the deep-spot marker shows the deepest depth actually surveyed.
- Deepest mapped contour
- 36 ft
- Survey year
- 2019
- Surface area
- 31 acres
- Shoreline
- 1.1 mi · lobed
- Aquatic vegetation
- 22% of surface · NDVI estimate
- Public access
- By water from another ramp · Indiana DNR: “Sand or Miller Boat Ramp”
Additional depth details7 contours
- Contour depths
- 0–36 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
- 41.33256, -85.41102
- IN DNR lake ID
- 155642891
- Vertical exaggeration
- 2.46× below the waterline; land at true scale
- Basemap
- USDA NAIP · public domain
- Model size
- 1.1 MB
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-21Rivir Lake has a heavily wooded and largely undeveloped setting, well sheltered geometry, little nearby major-road exposure. Watercraft controls: Electric motors only.
Why this score?5 components
Included in the index
| Component | Rating | Points of weight | Measurement |
|---|---|---|---|
| Natural setting | Excellent | 27.7 of 30 | 92% natural land cover within 150 m of shore (84% forest, 8% wetland; 4% developed) |
| Geometric wind exposure | Excellent | 24.0 of 25 | mean fetch 503 m · 53% of sampled water within 500 m of shelter · short fetch in most directions |
| Watercraft controls | Electric motors only | 14.2 of 15 | Electric motors only |
| Public access | Good | 12.8 of 15 | 1 DNR fishing access site · DNR directs boaters to a ramp on connected water |
| Road isolation | Excellent | 13.4 of 15 | relatively isolated from major roads · 2 INDOT-classified segments within 1.2 km, peak 4,350 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
- Moderate — approximately 22% 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
- High — 84% forest and 8% wetland cover within 150 m of shore
Compare Indiana lakes by Paddling Index →
Fish you might catch
from DNR surveys11 species with recent evidence in this lake — sized relative to each other. Illustrations are AI-generated representative adults in everyday colors, not photographs (provenance).
Hybrid SunfishAbout these fish → the Fish of Indiana guide
Fishing rules for this lake Beta
Size and daily limits for the 11 species found here — 8 open to harvest.
These are hook-and-line size and daily limit rules. The fishing code sets no closed season for these species on inland lakes, but posted property rules can close a water — see the notes. Gear, spearing and bow fishing, netting and bait collection are set by other sections of 312 IAC 9 and are not shown here.
From 312 IAC 9-7 (Sport fishing), Indiana Administrative Code (readopted 2025-03-25), and the 2026-2027 Indiana Fishing Regulations Guide · verified 2026-09-15. Regulations can change — the Indiana Administrative Code (312 IAC 9-7) is the controlling source; verify current regulations before fishing. Official regulations
Fishery
surveyed 2019Gamefish Largemouth Bass 51 · Bowfin 3
Panfish Bluegill 381 · Redear Sunfish 72 · Black Crappie 12
All survey species11 species
Gamefish
Panfish
Bullhead & catfish
Forage & nongame
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.
Rivir Lake — common questions
How deep is Rivir Lake?
The Indiana DNR reports a maximum depth of 36 ft for Rivir Lake. The survey's own contours reach 35 ft, so the depth below that is interpolated from the reported maximum rather than mapped.
How big is Rivir Lake?
Rivir Lake covers about 31 acres in Noble County, Indiana.
What fish are in Rivir Lake?
Species with survey, catch or recent-stocking evidence include largemouth bass, black crappie, bluegill, bowfin, brown bullhead, hybrid sunfish. The page lists all 11 species and the evidence behind each.
Is there public access to Rivir Lake?
The Indiana DNR lists Rivir Lake as open to the public by water rather than from a ramp of its own: its access record reads "Rivir Lake (Sand or Miller Boat Ramp)". The launch is on connected water, not on Rivir Lake itself.
Is the depth of Rivir Lake measured or estimated?
The survey contours reach 35 ft while the survey reports a maximum of 36 ft, so the basin between those depths is inferred by the model rather than measured.
