Birch Lake
51.3934° N, 92.3722° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Birch Lake, Ontario. 51.3934° N, 92.3722° W
Maximum depth 36 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/birch-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.
Birch Lake is 36 m deep at its deepest point, deeper than 85% of the 2,688 surveyed lakes in Ontario. It covers 117 km² and lies 3.5 km south of Casummit Lake.
Government surveys have recorded 18 fish species here, including walleye, cisco and northern pike.
- Maximum depth
- 36 m
- deeper than 85% of the 2,688 surveyed lakes in Ontario
- Area
- 117 km²
- larger than 99% of the 18,731 lakes in Ontario
- Shoreline
- 509 km
- longer than 99% of the 18,731 lakes in Ontario
- Fish species
- 18
- more than 94% of the 2,454 surveyed lakes in Ontario
- Elevation
- 393 m
Sun and moon today
- Civil dawn
- 6:50 a.m.
- Sunrise
- 7:23 a.m.
- Sunset
- 6:28 p.m.
- Civil dusk
- 7:02 p.m.
- Moonrise
- 6:15 a.m.
- Moonset
- 5:47 p.m.
- Moon
- Waning crescent, 1% lit
Depth
28% of Birch Lake is shallower than 3 m, and 5% 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 36 m, drawn from 642 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 45 government surveys (2009–2009) that recorded them.
Forage fish and other species (10)
Forage fish
- Trout-Perch 11
- Spottail Shiner 5
- Emerald Shiner 4
- Blacknose Shiner 2
- Logperch 2
- Mottled Sculpin 2
- Iowa Darter 1
- Lake Chub 1
Other
- White Sucker 16
- Shorthead Redhorse 2
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 6 species from Birch Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 60-65 cm | 4 | Do not eat | Mercury |
| Lake Whitefish | 45-50 cm | 16 | 16 | Arsenic |
| Northern Pike | 55-60 cm | 8 | 4 | Mercury |
| Walleye | 40-45 cm | 8 | Do not eat | Mercury |
| Burbot (Ling) | 50-55 cm | 12 | 4 | Mercury |
| White Sucker | 40-45 cm | 16 | 16 | Precautionary |
* 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.