Long Lake
40 ft
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Depth scale
Survey readout
Long Lake is mapped to a depth of 12.2 m (40 ft) on the Ontario MNRF survey and covers about 165 ha (407 acres) in Simcoe County, Ontario.
Measured from the Ontario MNRF bathymetry survey.
- Deepest mapped contour
- 12.2 m (40 ft)
- Surface area
- 165 ha (407 acres)
- Shoreline
- 19.3 km (12.0 mi) · irregular
- Fishing access
- No MNRF fishing access point listed within 100 m (the list is incomplete)
Additional depth details6 contours
- Contour depths
- 0–12.2 m (40 ft)
- Deep-spot markers
- 12.2 m (40 ft)
Provenance
Sources: Ontario MNRF / LIO Bathymetry, OpenStreetMap (ODbL), Contains information licensed under the Open Government Licence – Ontario, Contains modified Copernicus Sentinel data (Sentinel-2), processed by ontariolakedepths.com, 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 Copernicus Sentinel-2 satellite basemap and OpenStreetMap shoreline. Colour shows surveyed depth; dark lines are the survey's own isobaths.
- Coordinates
- 44.78940, -79.48557
- MNRF lake ID
- 17-6191-49604
- Vertical exaggeration
- 2.32×
- Basemap
- Copernicus Sentinel-2 · ESA, via Microsoft Planetary Computer
- Model size
- 2.0 MB
Check the source: this lake’s record (17-6191-49604) 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 2026-09-05. Depths between contours are interpolated, not measured.
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-16Long Lake has a mostly natural, lightly developed setting, moderate open-water exposure, little nearby major-road exposure.
Why this score?5 components
Included in the index
| Component | Rating | Points of weight | Measurement |
|---|---|---|---|
| Natural setting | Very Good | 33.4 of 43 | 78% natural land cover within 150 m of shore (67% forest, 3% wetland; 0% developed) |
| Geometric wind exposure | Good | 19.1 of 36 | mean fetch 1,273 m · 12% of sampled water within 500 m of shelter · moderate 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 | Excellent | 19.7 of 21 | relatively isolated from major roads · 2 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
- Moderate — 67% forest and 3% wetland cover within 150 m of shore
- Mapped wildlife habitat
- Mapped — Ontario MNRF has mapped waterfowl staging or nursery 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 · 2010–20173 angler trips logged here between August 2010 and August 2017 — 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
Long Lake — common questions
How deep is Long Lake?
The deepest contour on the Ontario MNRF bathymetric survey of Long 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 Long Lake?
Long Lake covers about 165 ha (407 acres) in Simcoe County, 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.
