Long Lake
550 ft
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Depth scale
Survey readout
Long Lake is mapped to a depth of 167.6 m (550 ft) on the Ontario MNRF survey and covers about 13,798 ha (34,095 acres) in Thunder Bay District, Ontario. Depths come from the Ontario MNRF survey of 1968.
Measured from the Ontario MNRF bathymetry survey.
- Deepest mapped contour
- 167.6 m (550 ft)
- Survey year
- 1968
- Surface area
- 13,798 ha (34,095 acres)
- Shoreline
- 282.1 km (175.3 mi) · irregular
- Fishing access
- No MNRF fishing access point listed within 100 m (the list is incomplete)
- Borders
- Ginoogaming First Nation · First Nation reserve · 5% of shoreline · First Nation rules may apply
- Borders
- Long Lake 58 · First Nation reserve · 4% of shoreline · First Nation rules may apply
Additional depth details29 contours
- Contour depths
- 0–167.6 m (550 ft)
- Deep-spot markers
- 167.6 m (550 ft)
Provenance
Sources: Ontario MNRF / LIO Bathymetry, Ontario FRI LiDAR DTM, OpenStreetMap (ODbL), Contains information licensed under the Open Government Licence – Ontario, Contains modified Copernicus Sentinel data (Sentinel-2), processed by ontariolakedepths.com.
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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 Copernicus Sentinel-2 satellite basemap and OpenStreetMap shoreline. Colour shows surveyed depth; dark lines are the survey's own isobaths.
- Coordinates
- 49.48335, -86.85954
- MNRF lake ID
- 16-5079-54800
- Vertical exaggeration
- 2.59× below the waterline; land at true scale
- Basemap
- Ontario FRI & Copernicus Sentinel-2 · ESA, via Microsoft Planetary Computer
- Model size
- 1.0 MB
Check the source: this lake’s record (16-5079-54800) 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: 1968. This model was built 2026-10-02. Depths between contours are interpolated, not measured.
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-29Long Lake has a heavily wooded and largely undeveloped setting, long open-water fetch, substantial nearby higher-volume roads.
Why this score?5 components
Included in the index
| Component | Rating | Points of weight | Measurement |
|---|---|---|---|
| Natural setting | Excellent | 39.1 of 43 | 92% natural land cover within 150 m of shore (87% forest, 4% wetland; 3% developed) |
| Geometric wind exposure | Modest | 1.8 of 36 | mean fetch 10,812 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 | Modest | 1.1 of 21 | substantial nearby higher-volume roads · 801 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 — 87% forest and 4% wetland cover within 150 m of shore
- Mapped wildlife habitat
- Mapped — Ontario MNRF has mapped moose aquatic feeding areas and waterfowl staging or nursery 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 →
Long Lake — common questions
How deep is Long Lake?
The deepest contour on the Ontario MNRF bathymetric survey of Long Lake is 167.6 m (550 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 Long Lake?
Long Lake covers about 13,798 ha (34,095 acres) in Thunder Bay District, Ontario.
Is there public access to Long Lake?
No fishing access point for Long Lake appears in the Ontario MNRF fishing access point list (within 100 m of the shoreline). That is not the same as the lake being private -- the MNRF list is incomplete, and many municipal, marina and private launches are not in it.
Do First Nation rules apply on Long Lake?
Long Lake has 5% of its shoreline in Ginoogaming First Nation, a First Nation reserve. Fishing, boating and access on reserve land and waters can be governed by the First Nation's own rules as well as Ontario's. Check with the First Nation before fishing or launching.
