Triangular Lake
51.4862° N, 87.9529° W
Depth contours from the 1978 government survey. Not for navigation.
Download the depth map (SVG)Triangular Lake, Ontario. 51.4862° N, 87.9529° W
Maximum depth 16 m (1978 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/triangular-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.
Triangular Lake is 16 m deep at its deepest point, deeper than 50% of the 2,688 surveyed lakes in Ontario. It covers 36.2 km² and lies 6.2 km southeast of Fort Hope.
Government surveys have recorded 1 fish species here: northern pike.
- Maximum depth
- 16 msurveyed 1978
- deeper than 50% of the 2,688 surveyed lakes in Ontario
- Area
- 36.2 km²
- larger than 98% of the 18,731 lakes in Ontario
- Shoreline
- 118 km
- longer than 98% of the 18,731 lakes in Ontario
- Fish species
- 1
- fewer than 100% of the 2,454 surveyed lakes in Ontario
- Elevation
- 256 m
Sun and moon today
- Civil dawn
- 7:32 a.m.
- Sunrise
- 8:05 a.m.
- Sunset
- 7:11 p.m.
- Civil dusk
- 7:44 p.m.
- Moonrise
- 6:57 a.m.
- Moonset
- 6:29 p.m.
- Moon
- Waning crescent, 1% lit
Depth
The government depth survey from 1978 records a maximum depth of 16 m, drawn from 44 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 Depths are from government surveys and may be outdated.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 1 government surveys (2024–2024) that recorded them.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 1 species from Triangular Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Walleye | 40-45 cm | 8 | 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 2. Check seasons and limits before you fish.