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Map of Richardson Lake with depth contours

Richardson Lake

50.1696° N, 92.0636° W

Depth contours from the government survey. Not for navigation.

Download the depth map (SVG)

Richardson Lake, Ontario. 50.1696° N, 92.0636° W

Maximum depth 21.3 m. Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/richardson-lake-near-sioux-lookout/, 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.
  • 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.

Richardson Lake is 21.3 m deep at its deepest point, deeper than 62% of the 2,688 surveyed lakes in Ontario. It covers 1.95 km² and lies 9.1 km northwest of Sioux Lookout.

Government surveys have recorded 11 fish species here, including walleye, yellow perch and lake whitefish.

Maximum depth
21.3 m
deeper than 62% of the 2,688 surveyed lakes in Ontario
Area
1.95 km²
larger than 80% of the 18,731 lakes in Ontario
Shoreline
9.7 km
longer than 73% of the 18,731 lakes in Ontario
Fish species
11
more than 77% of the 2,454 surveyed lakes in Ontario
Elevation
353 m

Today on the water

-1.2 °C

ClearWind calmfeels like -3 °C

Observed at Sioux Lookout, as of 2:00 a.m. CDT

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 7 a.m., wind from the south: the south shore is sheltered, waves build toward the north shore.

Time3 a.m.6 a.m.9 a.m.12 p.m.3 p.m.6 p.m.9 p.m.12 a.m.
Wind km/hvar. 5S 10S 20S 20SE 20SE 20SE 30SE 30
Gusts km/h405050
Waves (est.) m0.10.10.20.20.2
Temp. °C00510111197
Precip. %2020202060606010

Tonight: Partly cloudy. Becoming clear this evening. Wind northwest 30 km/h gusting to 50 becoming light this evening. Low minus 1.

Weather: Sioux Lookout (local forecast), as of 2:07 a.m. CDT

Sun and moon

Civil dawn
6:48 a.m.
Sunrise
7:21 a.m.
Sunset
6:28 p.m.
Civil dusk
7:01 p.m.
Moonrise
6:13 a.m.
Moonset
5:47 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

57% of Richardson Lake 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 records a maximum depth of 21.3 m, drawn from 12 depth contours.

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 Depths are from government surveys and may be outdated.

Fish

Sport fish by the share of the 19 government surveys (2009–2009) that recorded them.

  • Walleye12 of 19
  • Yellow Perch10 of 19
  • Lake Whitefish8 of 19
  • Northern Pike8 of 19
  • Smallmouth Bass4 of 19
  • Rock Bass3 of 19
  • Cisco2 of 19
  • Lake Trout1 of 19
Forage fish and other species (3)

Forage fish

  • Rainbow Smelt 5
  • Spottail Shiner 1

Other

  • White Sucker 1

Numbers are the surveys that recorded each species.

Eating your catch

The provincial guide to eating fish (2026) sets limits for 3 species from Richardson Lake. Maximum meals per month:

SpeciesLengthGeneral populationSensitive population*Contaminant
Northern Pike55-60 cm8Do not eatMercury
Smallmouth Bass35-40 cm8Do not eatMercury
Walleye40-45 cm164Mercury

* 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 4. Check seasons and limits before you fish.