Ontario Lake Depths
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Chemong Lake

Peterborough County, Ontario · MNRF bathymetric survey
6.7m Mapped depth
22 ft
1,165 ha 5 contours Fishing access
Paddling Index31Modest
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Depth scale

The lake

Survey readout

Chemong Lake is mapped to a depth of 6.7 m (22 ft) on the Ontario MNRF survey and covers about 1,165 ha (2,879 acres) in Peterborough County, Ontario.

Measured from the Ontario MNRF bathymetry survey.

Deepest mapped contour
6.7 m (22 ft)
Surface area
1,165 ha (2,879 acres)
Shoreline
35.5 km (22.1 mi) · irregular
Fishing access
3 MNRF fishing access points · 3 boat launches
Borders
Curve Lake 35 · First Nation reserve · 40% of shoreline · First Nation rules may apply
Additional depth details5 contours
Contour depths
0–6.7 m (22 ft)
Deep-spot markers
6.7 m (22 ft), 1.8 m (6 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
44.45642, -78.35937
MNRF lake ID
17-7107-49288
Vertical exaggeration
3.6× below the waterline; land at true scale
Basemap
Copernicus Sentinel-2 · ESA, via Microsoft Planetary Computer
Model size
2.1 MB

Check the source: this lake’s record (17-7107-49288) 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 2026-09-28. Depths between contours are interpolated, not measured.

Paddling

Paddling Index methodology v1.0 · calculated 2026-09-16
31 / 100ModestData confidence: High

Chemong 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 settingMixed12.3 of 3550% natural land cover within 150 m of shore (30% forest, 12% wetland; 27% developed)
Geometric wind exposureModest3.0 of 29mean fetch 3,524 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 accessGood15.0 of 183 MNRF fishing access points · boat ramp · ADA-accessible
Road isolationModest0.9 of 18substantial nearby higher-volume roads · 1024 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 — 30% forest and 12% 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.
Quick answers

Chemong Lake — common questions

How deep is Chemong Lake?

The deepest contour on the Ontario MNRF bathymetric survey of Chemong Lake is 6.7 m (22 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 Chemong Lake?

Chemong Lake covers about 1,165 ha (2,879 acres) in Peterborough County, Ontario.

Is there public access to Chemong Lake?

The Ontario MNRF lists 3 fishing access points within 100 m of the shoreline of Chemong Lake: 3 boat launches. 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.

Do First Nation rules apply on Chemong Lake?

Chemong Lake has 40% 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.