Ontario Lake Depths
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Buckhorn Lake

Peterborough County, Ontario · MNRF bathymetric survey
12.2m Mapped depth
40 ft
714 ha 8 contours
Paddling Index13ModestMedium confidence
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Depth scale

The lake

Survey readout

Buckhorn Lake is mapped to a depth of 12.2 m (40 ft) on the Ontario MNRF survey and covers about 714 ha (1,764 acres) in Peterborough County, Ontario.

Measured from the Ontario MNRF bathymetry survey.

Deepest mapped contour
12.2 m (40 ft)
Surface area
714 ha (1,764 acres)
Shoreline
32.8 km (20.4 mi) · irregular
Fishing access
No MNRF fishing access point listed within 100 m (the list is incomplete)
Borders
Curve Lake 35 · First Nation reserve · 11% of shoreline · First Nation rules may apply
Borders
Curve Lake 35A · First Nation reserve · part of the water · First Nation rules may apply
Additional depth details8 contours
Contour depths
0–12.2 m (40 ft)
Deep-spot markers
12.2 m (40 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
44.50398, -78.37101
MNRF lake ID
17-7074-49293
Vertical exaggeration
2.32×
Basemap
Copernicus Sentinel-2 · ESA, via Microsoft Planetary Computer
Model size
2.1 MB

Check the source: this lake’s record (17-7074-49293) 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 2026-09-11. Depths between contours are interpolated, not measured.

Paddling

Paddling Index methodology v1.0 · calculated 2026-09-16
13 / 100ModestData confidence: Medium

Buckhorn Lake has a mixed natural and developed setting, long open-water fetch, substantial nearby higher-volume roads.

Why this score?5 components

Included in the index

ComponentRatingPoints of weightMeasurement
Natural settingMixed10.5 of 4328% natural land cover within 150 m of shore (18% forest, 4% wetland; 10% developed)
Geometric wind exposureModest1.9 of 36mean fetch 3,978 m · 0% of sampled water within 500 m of shelter · long open-water 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 isolationModest1.1 of 21substantial nearby higher-volume roads · 1020 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 — 18% 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 · 2014–2025

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

20Trips logged
11Species
330Fish 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
Largemouth Bass11 of 20 trips · 61 caught
Bluegill9 of 20 trips · 107 caught
Walleye8 of 20 trips · 19 caught
Smallmouth Bass6 of 20 trips · 31 caught
Black Crappie6 of 20 trips · 18 caught
Yellow Perch5 of 20 trips · 23 caught
Pumpkinseed4 of 20 trips · 30 caught
Rock Bass3 of 20 trips · 13 caught
Common Carp1 trip · one angler’s report · 25 caught
Brown Bullhead1 trip · one angler’s report · 2 caught
Muskellunge1 trip · one angler’s report · 1 caught

How people fish it: boat 65% · shore 30% · ice 5%
Catch rate: about 2.6 fish an hour, all species together (19 trips, 109 hours logged)
Kept: 12% 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

Buckhorn Lake — common questions

How deep is Buckhorn Lake?

The deepest contour on the Ontario MNRF bathymetric survey of Buckhorn Lake is 12.2 m (40 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 Buckhorn Lake?

Buckhorn Lake covers about 714 ha (1,764 acres) in Peterborough County, Ontario.

Is there public access to Buckhorn Lake?

No fishing access point for Buckhorn Lake appears in the Ontario MNRF fishing access point list (within 100 m of the shoreline). That is not the same as the lake being private -- the MNRF list is incomplete, and many municipal, marina and private launches are not in it.

Do First Nation rules apply on Buckhorn Lake?

Buckhorn Lake has 11% of its shoreline in Curve Lake 35, a First Nation reserve. Fishing, boating and access on reserve land and waters can be governed by the First Nation's own rules as well as Ontario's. Check with the First Nation before fishing or launching.