Iroquois Bay
312 ft
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Depth scale
Survey readout
Iroquois Bay is mapped to a depth of 95 m (312 ft) on the Ontario MNRF survey and covers about 507 ha (1,253 acres) in Manitoulin District, Ontario.
Measured from the Ontario MNRF bathymetry survey.
- Deepest mapped contour
- 95 m (312 ft)
- Surface area
- 507 ha (1,253 acres)
- Shoreline
- 22.6 km (14.1 mi) · irregular
- Fishing access
- No MNRF fishing access point listed within 100 m (the list is incomplete)
- Borders
- Killarney Lakelands and Headwaters Provincial Park · Ontario Parks · 24% of shoreline
- Borders
- Whitefish River 4 · First Nation reserve · 19% of shoreline · First Nation rules may apply
Additional depth details48 contours
- Contour depths
- 0–95 m (312 ft)
- Deep-spot markers
- 95 m (312 ft), 75 m (246 ft), 30.5 m (100 ft), 30.5 m (100 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
- 46.10752, -81.64105
- MNRF lake ID
- 17-4505-51058
- Vertical exaggeration
- 1.4×
- Basemap
- Ontario FRI
- Model size
- 2.4 MB
Check the source: this lake’s record (17-4505-51058) 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: not recorded in the source. This model was built 2026-09-29. Depths between contours are interpolated, not measured.
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-29Iroquois Bay has a heavily wooded and largely undeveloped setting, notable open-water exposure, little nearby major-road exposure.
On a canoe route · portages mapped. Portage trails end at this shoreline. Portages carry canoes over land between waters, and the ground around the lake in the 3D view is terrain those trails cross. Trail condition, length and elevation change are not measured here — check the park or canoe-route map before you go. Trails: OpenStreetMap (ODbL).
Why this score?5 components
Included in the index
| Component | Rating | Points of weight | Measurement |
|---|---|---|---|
| Natural setting | Excellent | 36.7 of 43 | 87% natural land cover within 150 m of shore (70% forest, 3% wetland; 3% developed) |
| Geometric wind exposure | Mixed | 7.3 of 36 | mean fetch 2,780 m · 4% of sampled water within 500 m of shelter · long fetch in some directions |
| 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 | Excellent | 21.4 of 21 | relatively isolated from major roads · 0 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 — 70% forest and 3% wetland cover within 150 m of shore
- Mapped wildlife habitat
- Mapped — Ontario MNRF has mapped deer 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 →
Iroquois Bay — common questions
How deep is Iroquois Bay?
The deepest contour on the Ontario MNRF bathymetric survey of Iroquois Bay is 95 m (312 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 Iroquois Bay?
Iroquois Bay covers about 507 ha (1,253 acres) in Manitoulin District, Ontario.
Is there public access to Iroquois Bay?
No fishing access point for Iroquois Bay 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 Iroquois Bay?
Iroquois Bay has 19% of its shoreline in Whitefish River 4, 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.
