Ontario Lake Depths
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Mississagua Lake

Peterborough County, Ontario · MNRF bathymetric survey
43.9m Mapped depth
144 ft
443 ha 8 contours Fishing access
Paddling Index38Modest
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Depth scale

The lake

Survey readout

Mississagua Lake is mapped to a depth of 43.9 m (144 ft) on the Ontario MNRF survey and covers about 443 ha (1,096 acres) in Peterborough County, Ontario.

Measured from the Ontario MNRF bathymetry survey.

Deepest mapped contour
43.9 m (144 ft)
Surface area
443 ha (1,096 acres)
Shoreline
24.1 km (15.0 mi) · irregular
Fishing access
1 MNRF fishing access point · 1 boat launch
Additional depth details8 contours
Contour depths
0–43.9 m (144 ft)
Deep-spot markers
43.9 m (144 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
44.70631, -78.31902
MNRF lake ID
17-7123-49536
Vertical exaggeration
1.4×
Basemap
Ontario FRI
Model size
1.5 MB

Check the source: this lake’s record (17-7123-49536) 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 2026-09-16
38 / 100ModestData confidence: High

Mississagua Lake has a mixed natural and developed setting, notable open-water exposure, substantial nearby higher-volume roads.

Why this score?5 components

Included in the index

ComponentRatingPoints of weightMeasurement
Natural settingMixed12.8 of 3547% natural land cover within 150 m of shore (45% forest, 1% wetland; 28% developed)
Geometric wind exposureMixed7.3 of 29mean fetch 2,498 m · 3% 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 accessGood15.0 of 181 MNRF fishing access point · boat ramp
Road isolationModest3.2 of 18substantial nearby higher-volume roads · 248 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 — 45% forest and 1% 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.
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 · 2018–2025

What anglers say they caught here, logged trip by trip in Ontario’s Fish ON-Line app — most recently in July 2025.

9Trips logged
5Species
62Fish reported

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

Lake Trout4 of 9 trips · 8 caught
Smallmouth Bass3 of 9 trips · 32 caught
Rock Bass2 of 9 trips · 10 caught
Largemouth Bass1 trip · one angler’s report · 10 caught
Lake Whitefish1 trip · one angler’s report · 2 caught

How people fish it: boat 78% · shore 22%
Catch rate: about 1.5 fish an hour, all species together (9 trips, 41 hours logged)
Kept: 18% 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

Mississagua Lake — common questions

How deep is Mississagua Lake?

The deepest contour on the Ontario MNRF bathymetric survey of Mississagua Lake is 43.9 m (144 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 Mississagua Lake?

Mississagua Lake covers about 443 ha (1,096 acres) in Peterborough County, Ontario.

Is there public access to Mississagua Lake?

The Ontario MNRF lists 1 fishing access point within 100 m of the shoreline of Mississagua Lake: 1 boat launch. 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.