Ontario Lake Depths
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Three Legend Lake

Parry Sound District, Ontario · MNRF bathymetric survey
41m Mapped depth
135 ft
204 ha 41 contours Fishing access
Paddling Index79Goodwooded shoreline · away from major roads · sheltered geometry
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Depth scale

The lake

Survey readout

Three Legend Lake is mapped to a depth of 41 m (135 ft) on the Ontario MNRF survey and covers about 204 ha (504 acres) in Parry Sound District, Ontario. Depths come from the Ontario MNRF survey of 2012.

Measured from the Ontario MNRF bathymetry survey.

Deepest mapped contour
41 m (135 ft)
Survey year
2012
Surface area
204 ha (504 acres)
Shoreline
19.2 km (11.9 mi) · irregular
Fishing access
1 MNRF fishing access point · 1 boat launch
Borders
The Massasauga Provincial Park · Ontario Parks · 41% of shoreline
Additional depth details41 contours
Contour depths
0–41 m (135 ft)
Deep-spot markers
41 m (135 ft), 18 m (59 ft), 18 m (59 ft)
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Chart data

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
45.26340, -80.02209
MNRF lake ID
17-5769-50127
Vertical exaggeration
1.4×
Basemap
Ontario FRI
Model size
1.3 MB

Check the source: this lake’s record (17-5769-50127) 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: 2012. This model was built 2026-09-06. Depths between contours are interpolated, not measured.

Paddling

Paddling Index methodology v1.0 · calculated 2026-09-16
79 / 100GoodData confidence: High

Three Legend Lake has a heavily wooded and largely undeveloped setting, generally sheltered geometry, limited nearby major-road exposure.

On a canoe route · portages mapped. Portage trails end at this shoreline, including Portage - 370m. 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

ComponentRatingPoints of weightMeasurement
Natural settingExcellent33.0 of 3595% natural land cover within 150 m of shore (93% forest, 1% wetland; 4% developed)
Geometric wind exposureVery Good18.6 of 29mean fetch 990 m · 8% of sampled water within 500 m of shelter · generally short fetch
Motor & speed rulesNot 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 accessGood15.0 of 181 MNRF fishing access point · boat ramp
Road isolationVery Good12.0 of 18limited nearby major-road exposure · 15 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 — 93% forest and 1% 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.
How this index is calculated. The Paddling Index is a relative composite derived from lake geometry and public land-cover, access and road-network data. It is not a user review, a safety rating, or a prediction of an individual outing. Differences of a few points should not be treated as meaningful — an 84 and an 82 are broadly comparable. Components and weights for Ontario lakes: natural setting 35%, geometric wind exposure 29%, public access 18%, road isolation 18%. Motor and speed restrictions are not modelled for Ontario, and road traffic is estimated from road class, not measured. Where a component has no data the remaining weights are renormalized and the confidence rating is lowered; below Medium confidence no number is shown. Ontario scores are relative to other Ontario lakes and are not directly comparable with Paddling Index scores on our sister sites, which use different data sources and include a watercraft-rules component. Sources: Ontario MNRF bathymetry outline (0 m contour or survey index polygon), Ontario Land Cover v1.0, Ontario MNRF (Open Government Licence – Ontario) (2020), Ontario MNRF Fishing Access Points (Open Government Licence – Ontario) (2026-09) and Ontario Road Network (Open Government Licence – Ontario); traffic estimated by road class, not measured (2026-09). Conditions change quickly — check current weather and local conditions before going out.
Quick answers

Three Legend Lake — common questions

How deep is Three Legend Lake?

The deepest contour on the Ontario MNRF bathymetric survey of Three Legend Lake 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 Three Legend Lake?

Three Legend Lake covers about 204 ha (504 acres) in Parry Sound District, Ontario.

Is there public access to Three Legend Lake?

The Ontario MNRF lists 1 fishing access point within 100 m of the shoreline of Three Legend Lake: 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.