Lake Twentythree
66 ft
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Depth scale
Survey readout
Lake Twentythree is mapped to a depth of 20 m (66 ft) on the Ontario MNRF survey and covers about 8.1 ha (20 acres) in Algoma District, Ontario.
Measured from the Ontario MNRF bathymetry survey.
- Deepest mapped contour
- 20 m (66 ft)
- Surface area
- 8.1 ha (20 acres)
- Shoreline
- 2.4 km (1.5 mi) · irregular
- Fishing access
- 1 MNRF fishing access point · 1 boat launch
Additional depth details6 contours
- Contour depths
- 0–20 m (66 ft)
- Deep-spot markers
- 20 m (66 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
- 46.54461, -82.69615
- MNRF lake ID
- 17-3699-51558
- Vertical exaggeration
- 1.45×
- Basemap
- Ontario FRI
- Model size
- 0.8 MB
Check the source: this lake’s record (17-3699-51558) 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 2026-09-08. Depths between contours are interpolated, not measured.
Paddling
Paddling Index methodology v1.0 · calculated 2026-09-16Lake Twentythree has a heavily wooded and largely undeveloped setting, well sheltered geometry, some nearby classified roads.
Why this score?5 components
Included in the index
| Component | Rating | Points of weight | Measurement |
|---|---|---|---|
| Natural setting | Excellent | 30.5 of 35 | 90% natural land cover within 150 m of shore (90% forest, 0% wetland; 6% developed) |
| Geometric wind exposure | Excellent | 29.4 of 29 | mean fetch 365 m · 84% of sampled water within 500 m of shelter · short fetch in most 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 | Good | 15.0 of 18 | 1 MNRF fishing access point · boat ramp |
| Road isolation | Good | 10.9 of 18 | some nearby classified roads · 4 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
- Moderate — narrow in places — wakes would carry across parts 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 — 90% forest and 0% wetland cover within 150 m of shore
- Mapped wildlife habitat
- Mapped — Ontario MNRF has mapped moose aquatic feeding 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 · 2018–2025What anglers say they caught here, logged trip by trip in Ontario’s Fish ON-Line app — most recently in January 2025.
Pictures are sized relative to each other. Illustrations are AI-generated representative adults in everyday colours, not photographs (provenance).
How people fish it: ice 100%
Catch rate: about 0.5 fish an hour, all species together (7 trips, 29 hours logged)
Kept: 40% of the fish reported; the rest were released
About these fish → the Fish of Ontario guide
Lake Twentythree — common questions
How deep is Lake Twentythree?
The deepest contour on the Ontario MNRF bathymetric survey of Lake Twentythree is 20 m (66 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 Twentythree?
Lake Twentythree covers about 8.1 ha (20 acres) in Algoma District, Ontario.
Is there public access to Lake Twentythree?
The Ontario MNRF lists 1 fishing access point within 100 m of the shoreline of Lake Twentythree: 1 boat launch. Recorded ownership: 1 municipal. 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.
