Black Sturgeon Lake
160 ft
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Depth scale
Survey readout
Black Sturgeon Lake is mapped to a depth of 48.8 m (160 ft) on the Ontario MNRF survey and covers about 4,962 ha (12,261 acres) in Thunder Bay District, Ontario. Depths come from the Ontario MNRF survey of 1977.
Measured from the Ontario MNRF bathymetry survey.
- Deepest mapped contour
- 48.8 m (160 ft)
- Survey year
- 1977
- Surface area
- 4,962 ha (12,261 acres)
- Shoreline
- 70.7 km (44.0 mi) · irregular
- Fishing access
- 6 MNRF fishing access points · 6 boat launches
- In
- Black Sturgeon River Provincial Park · Ontario Parks
Additional depth details9 contours
- Contour depths
- 0–48.8 m (160 ft)
- Deep-spot markers
- 48.8 m (160 ft), 24.4 m (80 ft)
Provenance
Sources: Ontario MNRF / LIO Bathymetry, Ontario FRI Leaf-On Imagery, OpenStreetMap (ODbL), Contains information licensed under the Open Government Licence – Ontario, Copernicus DEM 30 m (© DLR/Airbus).
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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 Copernicus DEM (30 m) elevation, with a Ontario FRI aerial basemap and OpenStreetMap shoreline. Colour shows surveyed depth; dark lines are the survey's own isobaths.
- Coordinates
- 49.36578, -88.87572
- MNRF lake ID
- 16-3634-54687
- Vertical exaggeration
- 1.44×
- Basemap
- Ontario FRI
- Model size
- 2.4 MB
Check the source: this lake’s record (16-3634-54687) in the Ontario MNRF bathymetry index, and the contour line layer the map is drawn from (Land Information Ontario open data, Open Government Licence – Ontario). Survey year: 1977. This model was built 2026-09-27. Depths between contours are interpolated, not measured.
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-16Black Sturgeon Lake has a heavily wooded and largely undeveloped setting, long open-water fetch, limited nearby major-road exposure.
Why this score?5 components
Included in the index
| Component | Rating | Points of weight | Measurement |
|---|---|---|---|
| Natural setting | Excellent | 33.4 of 35 | 94% natural land cover within 150 m of shore (83% forest, 10% wetland; 1% developed) |
| Geometric wind exposure | Modest | 1.5 of 29 | mean fetch 7,440 m · 0% of sampled water within 500 m of shelter · long open-water fetch |
| Motor & speed rules | Not modelled | — | Canada publishes vessel motor and speed restrictions as federal legal schedules, not map data, so they are not part of the Ontario index. Check local signage and Transport Canada rules before going out. |
| Public access | Good | 15.0 of 18 | 6 MNRF fishing access points · boat ramp |
| Road isolation | Very Good | 11.6 of 18 | limited nearby major-road exposure · 18 Ontario Road Network segments within 1.2 km (traffic estimated from road class, not measured) |
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
- 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 — 83% forest and 10% wetland cover within 150 m of shore
- Mapped wildlife habitat
- Mapped — Ontario MNRF has mapped moose aquatic feeding areas and moose wintering areas within 1 km of this lake. These are habitat records from provincial surveys, not animal counts; areas with nothing mapped may still hold wildlife. · Ontario MNRF Wildlife Values Area. Contains information licensed under the Open Government Licence – Ontario.
Compare Ontario lakes by Paddling Index →
Angler catch reports
Fish ON-Line · 2013–20253 angler trips logged here between August 2013 and August 2025 — too few to show a pattern, so each species is listed with how many trips named it.
Pictures are sized relative to each other. Illustrations are AI-generated representative adults in everyday colours, not photographs (provenance).
About these fish → the Fish of Ontario guide
Black Sturgeon Lake — common questions
How deep is Black Sturgeon Lake?
The deepest contour on the Ontario MNRF bathymetric survey of Black Sturgeon Lake is 48.8 m (160 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 Black Sturgeon Lake?
Black Sturgeon Lake covers about 4,962 ha (12,261 acres) in Thunder Bay District, Ontario.
Is there public access to Black Sturgeon Lake?
The Ontario MNRF lists 6 fishing access points within 100 m of the shoreline of Black Sturgeon Lake: 6 boat launches. The list includes municipal and privately owned sites, and some may charge a fee or restrict parking, so it confirms a place anglers use rather than a public right of way. Check locally before you go.
