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Map of Marmion Lake with depth contours

Marmion Lake

48.8967° N, 91.519° W

Depth contours from the 1980 government survey. Not for navigation.

Download the depth map (SVG)

Marmion Lake, Ontario. 48.8967° N, 91.519° W

Maximum depth 30.5 m (1980 survey). Scale bar on the map.

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/marmion-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.

Marmion Lake is 30.5 m deep at its deepest point, deeper than 79% of the 2,688 surveyed lakes in Ontario. It covers 42.7 km² and lies 5.6 km northeast of Steep Rock Lake.

Government surveys have recorded 15 fish species here, including northern pike, walleye and yellow perch.

Maximum depth
30.5 msurveyed 1980
deeper than 79% of the 2,688 surveyed lakes in Ontario
Area
42.7 km²
larger than 99% of the 18,731 lakes in Ontario
Shoreline
244 km
longer than 99% of the 18,731 lakes in Ontario
Fish species
15
more than 89% of the 2,454 surveyed lakes in Ontario
Elevation
414 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 0.3 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
6:46 a.m.
Sunrise
7:17 a.m.
Sunset
6:28 p.m.
Civil dusk
6:59 p.m.
Moonrise
6:10 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

27% of Marmion 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 from 1980 records a maximum depth of 30.5 m, drawn from 233 depth contours.

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 Depths are from government surveys and may be outdated.

Fish

Sport fish by the share of the 26 government surveys (2010–2015) that recorded them.

  • Northern Pike19 of 26
  • Walleye17 of 26
  • Yellow Perch15 of 26
  • Lake Whitefish13 of 26
  • Cisco10 of 26
  • Smallmouth Bass9 of 26
  • Pumpkinseed3 of 26
Forage fish and other species (8)

Forage fish

  • Ninespine Stickleback 6
  • Golden Shiner 3
  • Mimic Shiner 3
  • Spottail Shiner 3
  • Trout-Perch 3
  • Blacknose Shiner 2
  • Logperch 2

Other

  • White Sucker 13

Numbers are the surveys that recorded each species.

Eating your catch

The provincial guide to eating fish (2026) sets limits for 5 species from Marmion Lake. Maximum meals per month:

SpeciesLengthGeneral populationSensitive population*Contaminant
Lake Whitefish45-50 cm2Do not eatPCB
Northern Pike55-60 cm84Mercury
Smallmouth Bass35-40 cm164Mercury
Walleye40-45 cm164Mercury
White Sucker40-45 cm1616Precautionary

* 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

6 listed boat launches; 1 with parking listed. marks launches on the map.

North shore

South shore

Southwest shore

West shore