Rock Lake
depth
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Depth scale
Survey readout
Rock Lake is mapped to a depth of 35 ft on the Minnesota DNR survey and covers about 176 acres in Wright County, Minnesota. Depths come from the Minnesota DNR survey of 1960.
Measured from the Minnesota DNR lake bathymetric contour survey.
- Deepest mapped contour
- 35 ft
- Survey year
- 1960
- Surface area
- 176 acres
- Shoreline
- 2.9 mi · irregular
- Aquatic vegetation
- 1% of surface · NDVI estimate
- Public access
- Trailer Launch · Rock Lake Public Water Access Site · Minnesota DNR site
Additional depth details7 contours
- Contour depths
- 0–35 ft
- Recorded point soundings
- 35 ft, 25 ft
Provenance
Sources: MN DNR Lake Bathymetric Contours, 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
- 45.17070, -94.01213
- MN DNR lake ID
- 86018200
- Vertical exaggeration
- 2.49×
- Basemap
- USDA NAIP · public domain
- Model size
- 2.2 MB
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-25Rock Lake has a mixed natural and developed setting, generally sheltered geometry, little nearby major-road exposure.
Why this score?5 components
Included in the index
| Component | Rating | Points of weight | Measurement |
|---|---|---|---|
| Natural setting | Mixed | 9.3 of 35 | 37% natural land cover within 150 m of shore (20% forest, 14% wetland; 25% developed) |
| Geometric wind exposure | Very Good | 17.2 of 29 | mean fetch 1,097 m · 2% of sampled water within 500 m of shelter · generally short fetch |
| Motor & speed rules | Not modeled | — | Minnesota’s lake-by-lake motor, speed and no-wake rules are mostly county and city ordinances, not map data, so they are not part of the Minnesota index. Check local signage and ordinances before going out. |
| Public access | Good | 15.0 of 18 | 1 DNR public access site · boat ramp |
| Road isolation | Excellent | 17.6 of 18 | relatively isolated from major roads · 2 MnDOT-classified segments within 1.2 km, peak 1,140 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 1% 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 — 20% forest and 14% wetland cover within 150 m of shore
Compare Minnesota lakes by Paddling Index →
Fish you might catch
from DNR surveys & active stocking16 species with recent evidence in this lake — sized relative to each other. Illustrations are AI-generated representative adults in everyday colors, not photographs (provenance).
Common Carp
Hybrid Sunfish
Golden ShinerAbout these fish → the Fish of Minnesota guide
Fishery
surveyed 2016Gamefish Largemouth Bass 141 · Walleye 36 · Northern Pike 13 · Bowfin 12
Panfish Bluegill 289 · Black Crappie 215 · White Crappie 47
All survey species16 species
Gamefish
Panfish
Bullhead & catfish
Forage & nongame
DNR stocking
state stocking record · 2016–2024Fish the Minnesota DNR has planted in this lake — what was added, distinct from what a survey netted above.
Infested waters listing
1 confirmedPlants & algae
Eurasian WatermilfoilConfirmed in this water in 1993 (listed 1995).
How to identify invasive species in Minnesota lakes →
What does the infested waters list mean?
The Minnesota DNR lists a lake, river, pond or wetland as infested when it contains an aquatic invasive species that could spread to other waters, or when it is connected to a water where one is present. Activities such as bait harvest and water use are managed differently on infested waters. Check the current list before moving water, bait or equipment.
Source: Minnesota Department of Natural Resources. List of Infested Waters, September 9, 2026. https://www.dnr.state.mn.us/invasives/ais/infested.html
Rock Lake — common questions
How deep is Rock Lake?
The deepest contour on the Minnesota DNR bathymetric survey of Rock 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 Rock Lake?
Rock Lake covers about 176 acres in Wright County, Minnesota.
What fish are in Rock Lake?
Species with survey, catch or recent-stocking evidence include largemouth bass, northern pike, walleye, black bullhead, black crappie, bluegill. The page lists all 16 species and the evidence behind each.
Is there public access to Rock Lake?
Yes. The Minnesota DNR lists a public access site on Rock Lake: a boat ramp with a boat dock. It is administered by the DNR Division of Parks and Trails. DNR directions: "3.5 mi S of the city of Maple Lake on Co. 8, near Rock Lake Campground, on E shore."
