Brunswick Lake
40 ft
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Depth scale
Survey readout
Brunswick Lake is mapped to a depth of 12.2 m (40 ft) on the Ontario MNRF survey and covers about 3,850 ha (9,514 acres) in Algoma District, Ontario. Depths come from the Ontario MNRF survey of 1971.
Measured from the Ontario MNRF bathymetry survey.
- Deepest mapped contour
- 12.2 m (40 ft)
- Survey year
- 1971
- Surface area
- 3,850 ha (9,514 acres)
- Shoreline
- 97.1 km (60.4 mi) · irregular
- Fishing access
- No MNRF launch listed · check with Missinaibi Provincial Park
- In
- Missinaibi Provincial Park · Ontario Parks
Additional depth details6 contours
- Contour depths
- 0–12.2 m (40 ft)
- Deep-spot markers
- 12.2 m (40 ft), 3 m (10 ft), 3 m (10 ft)
Provenance
Sources: Ontario MNRF / LIO Bathymetry, Ontario FRI Leaf-On Imagery, Ontario FRI LiDAR DTM, OpenStreetMap (ODbL), Contains information licensed under the Open Government Licence – Ontario.
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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 Ontario LiDAR (FRI DTM) elevation, with a Ontario FRI aerial basemap and OpenStreetMap shoreline. Colour shows surveyed depth; dark lines are the survey's own isobaths.
- Coordinates
- 48.98257, -83.38421
- MNRF lake ID
- 17-3275-54280
- Vertical exaggeration
- 3.6× below the waterline; land at true scale
- Basemap
- Ontario FRI
- Model size
- 2.3 MB
Check the source: this lake’s record (17-3275-54280) 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: 1971. This model was built 2026-10-01. Depths between contours are interpolated, not measured.
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-16Brunswick 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 | 37.6 of 43 | 86% natural land cover within 150 m of shore (62% forest, 24% wetland; 0% developed) |
| Geometric wind exposure | Modest | 1.8 of 36 | mean fetch 4,013 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 | Not listed | — | No publicly listed MNRF fishing access point within 100 m of this shoreline. Municipal, private and informal launches are not all in this source, so this is not evidence that access is poor — the component is excluded and the remaining weights are renormalized. |
| Road isolation | Very Good | 13.4 of 21 | limited nearby major-road exposure · 17 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 — 62% forest and 24% wetland cover within 150 m of shore
- Mapped wildlife habitat
- Mapped — Ontario MNRF has mapped moose aquatic feeding areas and moose wintering area 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 · 2018–20233 angler trips logged here between July 2018 and August 2023 — 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
Brunswick Lake — common questions
How deep is Brunswick Lake?
The deepest contour on the Ontario MNRF bathymetric survey of Brunswick Lake is 12.2 m (40 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 Brunswick Lake?
Brunswick Lake covers about 3,850 ha (9,514 acres) in Algoma District, Ontario.
Is there public access to Brunswick Lake?
No fishing access point for Brunswick Lake appears in the Ontario MNRF fishing access point list (within 100 m of the shoreline), but Brunswick Lake lies inside Missinaibi Provincial Park (Ontario Parks), which runs its own facilities and is not covered by that data. Check with the park for launch details.
