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Map of Lac Rochon with depth contours

Lac Rochon

46.6961° N, 75.2187° W

Depth contours from the 2014 government survey. Not for navigation.

Download the depth map (SVG)

Lac Rochon, Quebec. 46.6961° N, 75.2187° W

Maximum depth 41 m (2014 survey). Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/qc/lac-rochon/, 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.
  • Géobase des bathymétries de lac du Québec (GBLQ), Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs. Licensed under CC BY 4.0. Source: Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP), Données Québec.
  • États trophiques des lacs (RSVL), Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs. Licensed under CC BY 4.0. Source: Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP), Données Québec.
  • 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).

Lac Rochon is 41 m deep at its deepest point, deeper than 90% of the 1,506 surveyed lakes in Quebec. It covers 2.28 km² and lies beside Val-Viger.

Maximum depth
41 msurveyed 2014
deeper than 90% of the 1,506 surveyed lakes in Quebec
Area
2.28 km²
larger than 85% of the 29,407 lakes in Quebec
Shoreline
18.4 km
longer than 87% of the 29,407 lakes in Quebec
Water clarity
5.6 mSecchi depth, 2025
clearer than 79% of the 805 monitored lakes in Quebec
Elevation
257 m

Today on the water

6.6 °C

Wind calm

Observed at Mont-Laurier, as of 1:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m.

Time2 a.m.5 a.m.8 a.m.11 a.m.2 p.m.5 p.m.8 p.m.11 p.m.
Wind km/hW 10W 10W 10W 10NW 20NW 20NW 15NW 10
Waves (est.) m0.10.10.10.10.2
Temp. °C644710842
Precip. %60603030303000

Tonight: Mainly cloudy with 60 percent chance of showers. Wind west 20 km/h becoming light this evening. Low plus 4.

Weather: Mont-Laurier (local forecast), as of 1:01 a.m. EDT

Sun and moon

Civil dawn
6:40 a.m.
Sunrise
7:10 a.m.
Sunset
6:25 p.m.
Civil dusk
6:55 p.m.
Moonrise
6:01 a.m.
Moonset
5:43 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

18% of Lac Rochon is deeper than 20 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 2014 records a maximum depth of 41 m, drawn from 60 depth contours.

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

Water

Trophic status from the latest monitoring: oligotrophic.

Clarity was measured with a Secchi disk in 3 years between 2023 and 2025; the latest annual mean is 5.6 m.

Water clarity (Secchi depth, m)
Total phosphorus (µg/L)