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Map of Otukamamoan Lake with depth contours

Otukamamoan Lake

48.9608° N, 92.8943° W

Depth contours from the government survey. Not for navigation.

Download the depth map (SVG)

Otukamamoan Lake, Ontario. 48.9608° N, 92.8943° 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 Depths are from government surveys and may be outdated.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/otukamamoan-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.
  • 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.

Otukamamoan Lake is 48.8 m deep at its deepest point, deeper than 93% of the 2,688 surveyed lakes in Ontario. It covers 50.8 km² and lies 21 km northwest of Mine Centre.

Government surveys have recorded 16 fish species here, including walleye, yellow perch and cisco.

Maximum depth
48.8 m
deeper than 93% of the 2,688 surveyed lakes in Ontario
Area
50.8 km²
larger than 99% of the 18,731 lakes in Ontario
Shoreline
203 km
longer than 99% of the 18,731 lakes in Ontario
Fish species
16
more than 91% of the 2,454 surveyed lakes in Ontario
Elevation
356 m

Today on the water

-1 °C

Wind calmfeels like -2 °C

Observed at Mine Centre, as of 4:00 a.m. CDT

choppy Estimated waves, next 12 hours: up to 0.3 m. Around 10 a.m., wind from the southeast: the southeast shore is sheltered, waves build toward the northwest 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/hSE 10SE 10SE 20SE 20SE 20SE 20SE 20SE 15
Gusts km/h404040
Waves (est.) m0.10.10.30.30.3
Temp. °C24111516141413
Precip. %2020203030101010

Tonight: A few clouds. Wind west 20 km/h gusting to 40 becoming light this evening. Low plus 1.

Weather: Mine Centre (local forecast), as of 4:00 a.m. CDT

Sun and moon

Civil dawn
6:51 a.m.
Sunrise
7:23 a.m.
Sunset
6:33 p.m.
Civil dusk
7:05 p.m.
Moonrise
6:16 a.m.
Moonset
5:52 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

32% of Otukamamoan Lake 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 183 depth contours.

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 Depths are from government surveys and may be outdated.

Fish

Sport fish by the share of the 51 government surveys (2010–2010) that recorded them.

  • Walleye37 of 51
  • Yellow Perch21 of 51
  • Cisco18 of 51
  • Northern Pike18 of 51
  • Lake Whitefish15 of 51
  • Burbot14 of 51
  • Lake Trout10 of 51
  • Rock Bass9 of 51
  • Smallmouth Bass9 of 51
Forage fish and other species (7)

Forage fish

  • Spottail Shiner 8
  • Trout-Perch 8
  • Mottled Sculpin 2
  • Deepwater Sculpin 1
  • Johnny Darter 1

Other

  • White Sucker 15
  • Shorthead Redhorse 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 Otukamamoan Lake. Maximum meals per month:

SpeciesLengthGeneral populationSensitive population*Contaminant
Lake Trout50-55 cm4Do not eatMercury
Lake Whitefish45-50 cm168Mercury, PCB
Northern Pike55-60 cm4Do not eatMercury
Smallmouth Bass35-40 cm8Do not eatMercury
Walleye40-45 cm4Do not eatMercury
Burbot (Ling)50-55 cm4Do not eatMercury
White Sucker45-50 cm168Mercury

* 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.