Lake Simcoe
135 ft
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Depth scale
Survey readout
Lake Simcoe is mapped to a depth of 41 m (135 ft) on the Ontario MNRF survey and covers about 74,135 ha (183,191 acres) in York Region, Ontario. Depths come from the Ontario MNRF survey of 1957.
Measured from the Ontario MNRF bathymetry survey.
- Deepest mapped contour
- 41 m (135 ft)
- Survey year
- 1957
- Surface area
- 74,135 ha (183,191 acres)
- Shoreline
- 246.3 km (153.1 mi) · irregular
- Fishing access
- 12 MNRF fishing access points · 10 boat launches and 2 shoreline access sites
Additional depth details41 contours
- Contour depths
- 0–41 m (135 ft)
- Deep-spot markers
- 41 m (135 ft), 40 m (131 ft), 40 m (131 ft), 39 m (128 ft), 39 m (128 ft), 39 m (128 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
- 44.40672, -79.44829
- MNRF lake ID
- 17-6327-49193
- Basemap
- Copernicus Sentinel-2 · ESA, via Microsoft Planetary Computer
- Model size
- 1.4 MB
Check the source: this lake’s record (17-6327-49193) 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: 1957. This model was built 2026-09-29. Depths between contours are interpolated, not measured.
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-29Lake Simcoe has a substantially developed 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 | Modest | 0.7 of 35 | 30% natural land cover within 150 m of shore (14% forest, 14% wetland; 61% developed) |
| Geometric wind exposure | Modest | 1.5 of 29 | mean fetch 26,994 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 | 12 MNRF fishing access points · boat ramp |
| Road isolation | Modest | 0.9 of 18 | substantial nearby higher-volume roads · 9009 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
- Limited — 14% forest and 14% wetland cover within 150 m of shore
- Mapped wildlife habitat
- Mapped — Ontario MNRF has mapped deer wintering 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 →
Angler catch reports
Fish ON-Line · 2013–2026What anglers say they caught here, logged trip by trip in Ontario’s Fish ON-Line app — most recently in May 2026.
White Sucker
Goldeye
Aurora Trout
Mooneye
White Perch
Rainbow SmeltPictures are sized relative to each other. Illustrations are AI-generated representative adults in everyday colours, not photographs (provenance).
All species & trip details24 species
How people fish it: ice 48% · boat 30% · shore 23%
Catch rate: about 3.9 fish an hour, all species together (82 trips, 440 hours logged)
Kept: 22% of the fish reported; the rest were released
About these fish → the Fish of Ontario guide
Lake Simcoe — common questions
How deep is Lake Simcoe?
The deepest contour on the Ontario MNRF bathymetric survey of Lake Simcoe is 41 m (135 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 Lake Simcoe?
Lake Simcoe covers about 74,135 ha (183,191 acres) in York Region, Ontario.
Is there public access to Lake Simcoe?
The Ontario MNRF lists 12 fishing access points within 100 m of the shoreline of Lake Simcoe: 10 boat launches and 2 shoreline access sites. Recorded ownership: 5 municipal, 4 privately owned, 2 provincial. 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.
