Mountain Lake

Peterborough County, Ontario · MNRF bathymetric survey

— Max
depth

6.4 ha 0 contours

Paddling Index98ExcellentMedium confidenceaway from major roads · sheltered geometry · wooded shoreline

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Depth scale

00 m

The lake

Survey readout

Mountain Lake covers about 6.4 ha (16 acres) in Peterborough County, Ontario. The Ontario MNRF survey for this lake records a shoreline outline only, with no usable depth soundings, so a maximum depth cannot be stated.

Measured from the Ontario MNRF bathymetry survey.

Bathymetric depth unavailable. The source survey does not contain sufficient usable depth information to calculate lake depth for Mountain Lake — the Ontario MNRF record carries a shoreline outline without depth soundings. Surface area, location, access and fishery information below are unaffected.

Depth: Bathymetric depth unavailable
Surface area: 6.4 ha (16 acres)
Shoreline: 1.6 km (1.0 mi) · irregular
Fishing access: No MNRF launch listed · check with Kawartha Highlands Signature Site Park
In: Kawartha Highlands Signature Site Park · Ontario Parks

Additional depth details

Contour depths: shoreline only
Deep-spot markers: None marked

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Location

Peterborough County, Ontario · 15 nearest of 96 lakes · tap a dot for that lake

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: 44.65740, -78.22286
MNRF lake ID: 17-7202-49484
Vertical exaggeration: 3.0× below the waterline; land at true scale
Basemap: Ontario FRI
Model size: 1.4 MB

Check the source: this lake’s record (17-7202-49484) 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 2026-10-01. Depths between contours are interpolated, not measured.

Paddling

Paddling Index methodology v1.0 · calculated 2026-09-16

98 / 100ExcellentData confidence: Medium

Mountain Lake has a heavily wooded and largely undeveloped setting, well sheltered geometry, little nearby major-road exposure.

On a canoe route · portages mapped. Portage trails end at this shoreline, including Stoplog Lake - Mountain Lake Portage. 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

Component	Rating	Points of weight	Measurement
Natural setting	Excellent	40.6 of 43	94% natural land cover within 150 m of shore (65% forest, 3% wetland; 0% developed)
Geometric wind exposure	Excellent	35.7 of 36	mean fetch 303 m · 100% of sampled water within 500 m of shelter · short fetch in most directions
Motor & speed rules	Not 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 access	Not 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 isolation	Excellent	21.4 of 21	relatively isolated from major roads · 0 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: Moderate — narrow in places — wakes would carry across parts 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: High — 65% forest and 3% wetland cover within 150 m of shore
Mapped wildlife habitat: Mapped — Ontario MNRF has mapped moose wintering area 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.

Compare Ontario lakes by Paddling Index →

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 · 2018–2019

4 angler trips logged here between May 2018 and October 2019 — too few to show a pattern, so each species is listed with how many trips named it.

Rainbow Trout

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

Rainbow Trout4 of 4 trips · 4 caught

About these fish → the Fish of Ontario guide

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

Mountain Lake — common questions

How deep is Mountain Lake?

The Ontario MNRF survey for Mountain Lake contains no usable depth measurements, so a maximum depth cannot be stated.

How big is Mountain Lake?

Mountain Lake covers about 6.4 ha (16 acres) in Peterborough County, Ontario.

Is there public access to Mountain Lake?

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

More lakes in Peterborough County