Ontario Lake Depths
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Cyprus Lake

Bruce County, Ontario · MNRF bathymetric survey
7.6m Mapped depth
25 ft
74 ha 5 contours
Paddling Index65MixedMedium confidenceaway from major roads · sheltered geometry
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Depth scale

The lake

Survey readout

Cyprus Lake is mapped to a depth of 7.6 m (25 ft) on the Ontario MNRF survey and covers about 74 ha (184 acres) in Bruce County, Ontario. Depths come from the Ontario MNRF survey of 1968.

Measured from the Ontario MNRF bathymetry survey.

Deepest mapped contour
7.6 m (25 ft)
Survey year
1968
Surface area
74 ha (184 acres)
Shoreline
4.4 km (2.8 mi) · lobed
Fishing access
No MNRF launch listed · check with Bruce Peninsula National Park
In
Bruce Peninsula National Park · Parks Canada
Additional depth details5 contours
Contour depths
0–7.6 m (25 ft)
Deep-spot markers
7.6 m (25 ft)
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Chart data

Provenance

Sources: Ontario MNRF / LIO Bathymetry, OpenStreetMap (ODbL), Contains information licensed under the Open Government Licence – Ontario, Contains modified Copernicus Sentinel data (Sentinel-2), processed by ontariolakedepths.com, Copernicus DEM 30 m (© DLR/Airbus).

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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 Copernicus DEM (30 m) elevation, with a Copernicus Sentinel-2 satellite basemap and OpenStreetMap shoreline. Colour shows surveyed depth; dark lines are the survey's own isobaths.

Coordinates
45.23109, -81.53252
MNRF lake ID
17-4583-50085
Vertical exaggeration
2.83×
Basemap
Copernicus Sentinel-2 · ESA, via Microsoft Planetary Computer
Model size
0.7 MB

Check the source: this lake’s record (17-4583-50085) 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: 1968. This model was built 2026-09-05. Depths between contours are interpolated, not measured.

Paddling

Paddling Index methodology v1.0 · calculated 2026-09-16
65 / 100MixedData confidence: Medium

Cyprus Lake has a partly natural setting, generally sheltered geometry, little nearby major-road exposure.

Why this score?5 components

Included in the index

ComponentRatingPoints of weightMeasurement
Natural settingGood23.1 of 4372% natural land cover within 150 m of shore (68% forest, 4% wetland; 27% developed)
Geometric wind exposureVery Good20.6 of 36mean fetch 1,115 m · 0% 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 accessNot 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 isolationExcellent21.4 of 21relatively isolated from major roads · 2 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
Moderate — 68% forest and 4% 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) 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 · 2016–2025

3 angler trips logged here between June 2016 and June 2025 — too few to show a pattern, so each species is listed with how many trips named it.

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

Smallmouth Bass2 of 3 trips · 15 caught
Walleye1 trip · one angler’s report · 1 caught
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

Cyprus Lake — common questions

How deep is Cyprus Lake?

The deepest contour on the Ontario MNRF bathymetric survey of Cyprus Lake is 7.6 m (25 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 Cyprus Lake?

Cyprus Lake covers about 74 ha (184 acres) in Bruce County, Ontario.

Is there public access to Cyprus Lake?

No fishing access point for Cyprus Lake appears in the Ontario MNRF fishing access point list (within 100 m of the shoreline), but Cyprus Lake lies inside Bruce Peninsula National Park (Parks Canada), which runs its own facilities and is not covered by that data. Check with the park for launch details.