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Map of Crowrock Lake with depth contours

Crowrock Lake

48.9724° N, 91.7974° W

Depth contours from the government survey. Not for navigation.

Download the depth map (SVG)

Crowrock Lake, Ontario. 48.9724° N, 91.7974° W

Maximum depth 48.8 m. Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/crowrock-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.
  • Aquatic Resource Area survey points, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
  • 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).
  • Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
  • Ontario Waterbody Location Identifier, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.

Crowrock Lake is 48.8 m deep at its deepest point, deeper than 93% of the 2,688 surveyed lakes in Ontario. It covers 18.3 km² and lies 17 km northwest of Steep Rock Lake.

Government surveys have recorded 9 fish species here, including lake whitefish, walleye and burbot.

Maximum depth
48.8 m
deeper than 93% of the 2,688 surveyed lakes in Ontario
Area
18.3 km²
larger than 97% of the 18,731 lakes in Ontario
Shoreline
114 km
longer than 98% of the 18,731 lakes in Ontario
Fish species
9
more than 69% of the 2,454 surveyed lakes in Ontario
Elevation
431 m

Today on the water

0.4 °C

Wind ENE 2 km/h

Observed at Atikokan, as of 8:00 a.m. EST

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 7 p.m., wind from the southeast: the southeast shore is sheltered, waves build toward the northwest shore.

Time9 a.m.12 p.m.3 p.m.6 p.m.9 p.m.12 a.m.3 a.m.6 a.m.
Wind km/hvar. 5var. 5SE 10SE 10SE 20SE 20SE 20SE 20
Gusts km/h40404040
Waves (est.) m0.10.10.10.1
Temp. °C4111513108910
Precip. %00000000

Today: Increasing cloudiness this morning. Wind up to 15 km/h. High 16. Wind chill minus 4 this morning. UV index 3 or moderate.

Weather: Atikokan (local forecast), as of 8:03 a.m. EST

Sun and moon

Civil dawn
6:47 a.m.
Sunrise
7:18 a.m.
Sunset
6:29 p.m.
Civil dusk
7:00 p.m.
Moonrise
6:12 a.m.
Moonset
5:48 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

17% of Crowrock Lake is shallower than 3 m, and 31% 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 records a maximum depth of 48.8 m, drawn from 46 depth contours.

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

Fish

Sport fish by the share of the 27 government surveys (2010–2010) that recorded them.

  • Lake Whitefish16 of 27
  • Walleye13 of 27
  • Burbot8 of 27
  • Smallmouth Bass4 of 27
  • Yellow Perch4 of 27
  • Cisco3 of 27
  • Lake Trout3 of 27
  • Northern Pike2 of 27
Other species (1)
  • White Sucker 9

Numbers are the surveys that recorded each species.

Eating your catch

The provincial guide to eating fish (2026) sets limits for 7 species from Crowrock Lake. Maximum meals per month:

SpeciesLengthGeneral populationSensitive population*Contaminant
Lake Trout50-55 cm4Do not eatMercury
Lake Whitefish45-50 cm84PFAS
Northern Pike55-60 cm4Do not eatMercury, PFAS
Smallmouth Bass35-40 cm4Do not eatMercury
Walleye40-45 cm4Do not eatMercury
Burbot (Ling)50-55 cm4Do not eatMercury
White Sucker40-45 cm168Mercury, PFAS

* As defined in the guide, including children and people who are or may become pregnant. Limits are for the length the guide lists most often; they change with the size of the fish. Read the official guide

Fishing regulations: Fisheries Management Zone 5. Check seasons and limits before you fish.

Getting on the water

2 listed boat launches. marks launches on the map.

Northeast end

Southeast shore