Mamakwash Lake
51.6627° N, 92.9347° W
Depth contours from the 1977 government survey. Not for navigation.
Download the depth map (SVG)Mamakwash Lake, Ontario. 51.6627° N, 92.9347° W
Maximum depth 18.3 m (1977 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/mamakwash-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.
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
Mamakwash Lake is 18.3 m deep at its deepest point, deeper than 54% of the 2,688 surveyed lakes in Ontario. It covers 23.5 km² and lies 40 km northwest of Swain Post.
Government surveys have recorded 10 fish species here, including walleye, cisco and northern pike.
- Maximum depth
- 18.3 msurveyed 1977
- deeper than 54% of the 2,688 surveyed lakes in Ontario
- Area
- 23.5 km²
- larger than 98% of the 18,731 lakes in Ontario
- Shoreline
- 110 km
- longer than 98% of the 18,731 lakes in Ontario
- Fish species
- 10
- more than 73% of the 2,454 surveyed lakes in Ontario
- Elevation
- 368 m
Sun and moon today
- Civil dawn
- 6:52 a.m.
- Sunrise
- 7:26 a.m.
- Sunset
- 6:30 p.m.
- Civil dusk
- 7:04 p.m.
- Moonrise
- 6:18 a.m.
- Moonset
- 5:49 p.m.
- Moon
- Waning crescent, 1% lit
Depth
The government depth survey from 1977 records a maximum depth of 18.3 m, drawn from 68 depth contours.
- Download the depth map (SVG)Printing this page gives the map on one sheet, with scale and sources.
Not for navigation. Depths are from government surveys and may be outdated.
Fish
Sport fish by the share of the 30 government surveys (2013–2013) that recorded them.
Forage fish and other species (4)
Forage fish
- Trout-Perch 7
- Spottail Shiner 6
- Mimic Shiner 1
Other
- White Sucker 10
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 2 species from Mamakwash Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Northern Pike | 55-60 cm | 4 | Do not eat | Mercury |
| Walleye | 40-45 cm | 4 | Do not eat | Mercury |
* 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.