Tom Thomson Lake
90 ft
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Depth scale
Survey readout
Tom Thomson Lake is mapped to a depth of 27.4 m (90 ft) on the Ontario MNRF survey and covers about 154 ha (381 acres) in Nipissing District, Ontario.
Measured from the Ontario MNRF bathymetry survey.
- Deepest mapped contour
- 27.4 m (90 ft)
- Surface area
- 154 ha (381 acres)
- Shoreline
- 11.2 km (6.9 mi) · irregular
- Fishing access
- No MNRF launch listed · check with Algonquin Provincial Park
- In
- Algonquin Provincial Park · Ontario Parks
Additional depth details10 contours
- Contour depths
- 0–27.4 m (90 ft)
- Deep-spot markers
- 27.4 m (90 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
- 45.63200, -78.73058
- MNRF lake ID
- 17-6768-50553
- Vertical exaggeration
- 1.4×
- Basemap
- Ontario FRI
- Model size
- 1.3 MB
Check the source: this lake’s record (17-6768-50553) 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 2026-09-06. Depths between contours are interpolated, not measured.
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-16Tom Thomson Lake has a heavily wooded and largely undeveloped setting, moderate open-water exposure, little nearby major-road exposure.
On a canoe route · portages mapped. Portage trails end at this shoreline, including Portage Tom Thomson Lake - Ink Lake. 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 | 42.3 of 43 | 98% natural land cover within 150 m of shore (96% forest, 3% wetland; 0% developed) |
| Geometric wind exposure | Good | 18.5 of 36 | mean fetch 1,285 m · 0% 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 | 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 — 96% forest and 3% wetland cover within 150 m of shore
- Mapped wildlife habitat
- None mapped — Ontario MNRF has not mapped moose, deer or waterfowl habitat within 1 km of this lake. The province maps these areas where it has surveyed, so this is not evidence that wildlife is absent. · 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 · 2020–2025What anglers say they caught here, logged trip by trip in Ontario’s Fish ON-Line app — most recently in May 2025.
Pictures are sized relative to each other. Illustrations are AI-generated representative adults in everyday colours, not photographs (provenance).
How people fish it: boat 80% · shore 20%
Catch rate: about 0.3 fish an hour, all species together (5 trips, 21 hours logged)
Kept: 57% of the fish reported; the rest were released
About these fish → the Fish of Ontario guide
Tom Thomson Lake — common questions
How deep is Tom Thomson Lake?
The deepest contour on the Ontario MNRF bathymetric survey of Tom Thomson Lake is 27.4 m (90 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 Tom Thomson Lake?
Tom Thomson Lake covers about 154 ha (381 acres) in Nipissing District, Ontario.
Is there public access to Tom Thomson Lake?
No fishing access point for Tom Thomson Lake appears in the Ontario MNRF fishing access point list (within 100 m of the shoreline), but Tom Thomson Lake lies inside Algonquin Provincial Park (Ontario Parks), which runs its own facilities and is not covered by that data. Check with the park for launch details.
