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Map of Dossier Lake with depth contours

Dossier Lake

47.7529° N, 84.7169° W

Depth contours from the 1977 government survey. Not for navigation.

Download the depth map (SVG)

Dossier Lake, Ontario. 47.7529° N, 84.7169° W

Maximum depth 26 m (1977 survey). Scale bar on the map.

Not for navigation. Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/dossier-lake/, compiled October 9, 2026

  • Canadian Geographical Names Database, Natural Resources Canada. Contains information licensed under the Open Government Licence – Canada.
  • HydroLAKES v1.0, Messager et al. 2016 / WWF HydroSHEDS. Licensed under CC BY 4.0.
  • Census boundaries and population, 2021, Statistics Canada. Adapted from Statistics Canada. This does not constitute an endorsement by Statistics Canada.
  • Fishing access points, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
  • Fisheries Management Zones, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
  • Bathymetry lines and survey index, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
  • City page weather forecasts and alerts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).

Dossier Lake is 26 m deep at its deepest point, deeper than 73% of the 2,688 surveyed lakes in Ontario. It covers 0.7 km² and lies 18 km west of Millwood.

Maximum depth
26 msurveyed 1977
deeper than 73% of the 2,688 surveyed lakes in Ontario
Area
0.7 km²
larger than 59% of the 18,731 lakes in Ontario
Shoreline
8.3 km
longer than 68% of the 18,731 lakes in Ontario
Elevation
352 m

Today on the water

6.3 °C

Wind calm

Observed at Lake Superior (Provincial Park), as of 4:00 a.m. EDT

calm Estimated waves, next 12 hours: up to 0.1 m. Around 5 a.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.

Time5 a.m.8 a.m.11 a.m.2 p.m.5 p.m.8 p.m.11 p.m.2 a.m.
Wind km/hNW 10var. 5var. 5W 10var. 5SE 10SE 10SE 15
Waves (est.) m0.10.10.10.10.1
Temp. °C6361011647
Precip. %30101000000

Tonight: Partly cloudy with 60 percent chance of showers. Wind northwest 30 km/h gusting to 50 becoming light this evening. Low plus 3.

Weather: Lake Superior (Provincial Park) (local forecast), as of 4:02 a.m. EDT

Sun and moon

Civil dawn
7:18 a.m.
Sunrise
7:49 a.m.
Sunset
7:01 p.m.
Civil dusk
7:32 p.m.
Moonrise
6:41 a.m.
Moonset
6:20 p.m.
Moon
Waning crescent, 1% lit

Data Source: Environment and Climate Change Canada. Local times.

How waves are estimated

Significant wave height from the forecast hourly wind and the open-water distance (fetch) upwind, using the SMB method (US Army Corps of Engineers Shore Protection Manual, 1984), rounded up to the next 0.1 m. It is not a measurement: gusts, leftover swell and shoals can make water rougher. Under 0.2 m: calm; 0.2–0.5 m: choppy; over 0.5 m: rough.

Depth

43% of Dossier Lake is shallower than 3 m, and 20% is deeper than 10 m.

How to read it: the lake’s area is sorted from the shore to the deepest point. Where the curve is flat, large areas share one depth (flats and weed beds); where it drops, depth changes quickly (drop-offs).

The government depth survey from 1977 records a maximum depth of 26 m, drawn from 30 depth contours.

Not for navigation. Depths are from government surveys and may be outdated.

Getting on the water

1 listed boat launch. marks launches on the map.