Ontario Lake Depths
NESW

Peninsula Lake

Muskoka, Ontario · MNRF bathymetric survey
36m Mapped depth
118 ft
846 ha 36 contours Fishing access
Paddling Index25Modest
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Depth scale

The lake

Survey readout

Peninsula Lake is mapped to a depth of 36 m (118 ft) on the Ontario MNRF survey and covers about 846 ha (2,090 acres) in Muskoka, Ontario. Depths come from the Ontario MNRF survey of 2005.

Measured from the Ontario MNRF bathymetry survey.

Deepest mapped contour
36 m (118 ft)
Survey year
2005
Surface area
846 ha (2,090 acres)
Shoreline
28.8 km (17.9 mi) · irregular
Fishing access
2 MNRF fishing access points · 2 shoreline access sites
Additional depth details36 contours
Contour depths
0–36 m (118 ft)
Deep-spot markers
36 m (118 ft), 35 m (115 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
45.34373, -79.10225
MNRF lake ID
17-6488-50221
Vertical exaggeration
2.99× below the waterline; land at true scale
Basemap
Ontario FRI
Model size
1.7 MB

Check the source: this lake’s record (17-6488-50221) 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: 2005. This model was built 2026-09-13. Depths between contours are interpolated, not measured.

Paddling

Paddling Index methodology v1.0 · calculated 2026-09-16
25 / 100ModestData confidence: High

Peninsula Lake has a substantially developed setting, notable open-water exposure, substantial nearby higher-volume roads.

On a canoe route · portages mapped. Portage trails end at this shoreline. 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 settingModest4.5 of 3532% natural land cover within 150 m of shore (31% forest, 0% wetland; 55% developed)
Geometric wind exposureMixed7.4 of 29mean fetch 2,468 m · 2% of sampled water within 500 m of shelter · long fetch in some directions
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 accessGood12.3 of 182 MNRF fishing access points · shoreline access
Road isolationModest0.9 of 18substantial nearby higher-volume roads · 207 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 — 31% forest and 0% wetland cover within 150 m of shore
Mapped wildlife habitat
Mapped — Ontario MNRF has mapped deer wintering 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.
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.

Angler catch reports

Fish ON-Line · 2012–2026

What anglers say they caught here, logged trip by trip in Ontario’s Fish ON-Line app — most recently in May 2026.

28Trips logged
11Species
109Fish reported

Pictures are sized relative to each other. Illustrations are AI-generated representative adults in everyday colours, not photographs (provenance).

All species & trip details11 species
Lake Trout16 of 28 trips · 23 caught
Northern Pike6 of 28 trips · 11 caught
Smallmouth Bass4 of 28 trips · 9 caught
Channel Catfish2 of 28 trips · 2 caught
Walleye2 of 28 trips · 2 caught
Rock Bass1 trip · one angler’s report · 30 caught
Yellow Perch1 trip · one angler’s report · 13 caught
Pumpkinseed1 trip · one angler’s report · 10 caught
Bluegill1 trip · one angler’s report · 6 caught
Largemouth Bass1 trip · one angler’s report · 2 caught
Brook Trout1 trip · one angler’s report · 1 caught

How people fish it: ice 57% · boat 29% · shore 14%
Catch rate: about 1.0 fish an hour, all species together (28 trips, 114 hours logged)
Kept: 20% of the fish reported; the rest were released

Trips are logged voluntarily by anglers in Ontario’s Fish ON-Line app. This is what people report catching, not a Ministry survey, and a species nobody has logged may still be here. Contains information licensed under the Open Government Licence – Ontario. Source: Ontario Ministry of Natural Resources, Fish ON-Line. A logged catch does not mean it is legal to catch or keep: check the Ontario Fishing Regulations Summary for this lake’s zone and exceptions.
Quick answers

Peninsula Lake — common questions

How deep is Peninsula Lake?

The deepest contour on the Ontario MNRF bathymetric survey of Peninsula Lake is 36 m (118 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 Peninsula Lake?

Peninsula Lake covers about 846 ha (2,090 acres) in Muskoka, Ontario.

Is there public access to Peninsula Lake?

The Ontario MNRF lists 2 fishing access points within 100 m of the shoreline of Peninsula Lake: 2 shoreline access sites. Recorded ownership: 2 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.