Round Lake
depth
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Depth scale
Survey readout
Round Lake is mapped to a depth of 30 ft on the Michigan DNR survey and covers about 81 acres in Hillsdale County, Michigan.
Measured from the Michigan DNR inland-lake contour survey (depths read from the survey's isobath field; this lake's summary-depth column is blank in the source).
- Deepest mapped contour
- 30 ft
- Mean depth
- 21.4 ft · estimated
- Surface area
- 81 acres
- Estimated volume
- 1,729 acre-ft · 564M gal
- Shoreline
- 1.72 mi · lobed
- Aquatic vegetation
- 5% of surface · NDVI estimate
- Public access
- Boat Launch
Additional depth details4 contours
- Contour depths
- 0–30 ft
- Recorded point soundings
- 30 ft
15.2% of the surface sits over water shallower than 10 ft; 67.5% is deeper than 20 ft. Depth, area and volume are estimated from the interpolated survey surface — historical reference, not measurement.
Compare with another lakeProvenance
Sources: MI DNR inland lake contours, USGS 3DEP, USDA NAIP (public domain), OpenStreetMap (ODbL), MI DNR Boat Launches.
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Map details & sources5 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. Colour shows surveyed depth; dark lines are the survey's own isobaths.
- Coordinates
- 41.89691, -84.76959
- MI DNR lake ID
- L4643
- Vertical exaggeration
- 2.66×
- Basemap
- USDA NAIP · public domain
- Model size
- 2.2 MB
Paddling
Paddling Index methodology v1.0 · calculated 2026-08-21Round Lake has a mixed natural and developed setting, generally sheltered geometry, limited nearby major-road exposure. 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 | Mixed | 12.1 of 30 | 50% natural land cover within 150 m of shore (18% forest, 33% wetland; 35% developed) |
| Geometric wind exposure | Very Good | 20.6 of 25 | mean fetch 635 m · 14% of sampled water within 500 m of shelter · generally short fetch |
| Watercraft controls | None identified | 7.5 of 15 | No special watercraft restriction identified in the current DNR source. Motors permitted, subject to general law. |
| Public access | Good | 12.8 of 15 | 1 site with DNR boating-facility records · 1 ramp lane · 3 trailer spaces |
| Road isolation | Very Good | 9.7 of 15 | limited nearby major-road exposure · 12 MDOT-classified segments within 1.2 km, peak 1,714 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
- Low — wide enough that wakes disperse over most of the lake
- Aquatic vegetation
- Low — approximately 5% 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
- Moderate — 18% forest and 33% wetland cover within 150 m of shore
Compare Michigan lakes by Paddling Index →
Fish you might catch
from angler catches & DNR surveys10 species with recent evidence in this lake — sized relative to each other. Illustrations are AI-generated representative adults in everyday colours, not photographs (provenance).
Largemouth Bass
Bullhead
Black CrappieCrappie
Yellow Perch
Bluegill
Rock Bass
Warmouth
Pumpkinseed
Green SunfishFishing rules for this lake Beta
Size and daily limits for the 10 species found here — 10 open to harvest.
These are hook-and-line size, daily limit and season rules. Gear, spearing and bow fishing, spawning closures and rod limits are set by other Fisheries Orders and are not shown here.
From FO-206.26 (eff. 2026-04-01) / FO-215.23A (eff. 2023-09-15) / FO-254.25 (eff. 2025-10-10), checked against the 2026 Michigan Fishing Regulations digest · verified 2026-08-24. Regulations can change — Michigan DNR rules are the controlling source; verify current regulations before fishing. Official regulations
Notable catches
Master Angler program · 1995–2025Master Angler catches recorded on this lake — too few to show a pattern, so they are listed individually.
Fishery
Gamefish Largemouth Bass 6
Panfish Bluegill 153 · Yellow Perch 98 · Warmouth 18
All survey species9 species
Gamefish
Panfish
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.
At the lake
community-mapped amenities · straight-line distanceBait & tackle nearby
licensed retail bait dealers · straight-line distanceRound Lake — common questions
How deep is Round Lake?
The deepest contour on the Michigan DNR bathymetric survey of Round Lake is 30 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 Round Lake?
Round Lake covers about 81 acres in Hillsdale County, Michigan.
What is the average depth of Round Lake?
The estimated mean depth of Round Lake is 21.4 ft, calculated from the survey contours.
What fish are in Round Lake?
Species with survey, catch or recent-stocking evidence include largemouth bass, black crappie, bluegill, bullhead, crappie, green sunfish. The page lists all 10 species and the evidence behind each.
Is there public access to Round Lake?
Yes. The Michigan DNR boat-launch data identifies 1 public access site on Round Lake, including Round Lake.
