Louisa Lake
48.1557° N, 91.3207° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Louisa Lake, Ontario. 48.1557° N, 91.3207° W
Maximum depth 73.2 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/louisa-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.
Louisa Lake is 73.2 m deep at its deepest point, deeper than 97% of the 2,688 surveyed lakes in Ontario. It covers 7.25 km² and lies 30 km west of Saganaga Lake.
Government surveys have recorded 11 fish species here, including lake trout, yellow perch and cisco.
- Maximum depth
- 73.2 m
- deeper than 97% of the 2,688 surveyed lakes in Ontario
- Area
- 7.25 km²
- larger than 94% of the 18,731 lakes in Ontario
- Shoreline
- 31.7 km
- longer than 93% of the 18,731 lakes in Ontario
- Fish species
- 11
- more than 81% of the 2,454 surveyed lakes in Ontario
- Elevation
- 439 m
Sun and moon today
- Civil dawn
- 6:45 a.m.
- Sunrise
- 7:16 a.m.
- Sunset
- 6:27 p.m.
- Civil dusk
- 6:59 p.m.
- Moonrise
- 6:09 a.m.
- Moonset
- 5:47 p.m.
- Moon
- Waning crescent, 1% lit
Depth
26% of Louisa Lake is deeper than 30 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 73.2 m, drawn from 33 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 33 government surveys (2010–2010) that recorded them.
Forage fish and other species (8)
Forage fish
- Northern Pearl Dace 6
- Blacknose Shiner 2
- Emerald Shiner 1
- Lake Chub 1
- Mimic Shiner 1
- Spottail Shiner 1
Other
- White Sucker 24
- Green Sunfish 3
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 2 species from Louisa Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 50-55 cm | 12 | 4 | Mercury |
| White Sucker | 40-45 cm | 12 | 4 | 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 5. Check seasons and limits before you fish.