Black Sturgeon Lake
49.3582° N, 88.8721° W
Depth contours from the 1977 government survey. Not for navigation.
Download the depth map (SVG)Black Sturgeon Lake, Ontario. 49.3582° N, 88.8721° W
Maximum depth 48.8 m (1977 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/black-sturgeon-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.
- Fish stocking for recreational purposes, 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.
Black Sturgeon Lake is 48.8 m deep at its deepest point, deeper than 93% of the 2,688 surveyed lakes in Ontario. It covers 48.9 km² and lies 30 km northwest of Eagle Mountain.
Government surveys have recorded 14 fish species here, including walleye, yellow perch and cisco.
- Maximum depth
- 48.8 msurveyed 1977
- deeper than 93% of the 2,688 surveyed lakes in Ontario
- Area
- 48.9 km²
- larger than 99% of the 18,731 lakes in Ontario
- Shoreline
- 65.2 km
- longer than 97% of the 18,731 lakes in Ontario
- Fish species
- 14
- more than 86% of the 2,454 surveyed lakes in Ontario
- Elevation
- 249 m
Today on the water
-0.8 °C
Observed at Gull Bay, as of 3:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.3 m. Around 2 p.m., wind from the southeast: the southeast shore is sheltered, waves build toward the northwest shore.
| Time | 4 a.m. | 7 a.m. | 10 a.m. | 1 p.m. | 4 p.m. | 7 p.m. | 10 p.m. | 1 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | W 10 | SW 10 | SE 10 | SE 15 | S 15 | S 20 | SE 30 |
| Gusts km/h | 40 | 50 | ||||||
| Waves (est.) m | 0.2 | 0.2 | 0.1 | 0.2 | ||||
| Temp. °C | 4 | 2 | 5 | 9 | 12 | 11 | 9 | 8 |
| Precip. % | 20 | 20 | 20 | 20 | 40 | 40 | 40 | 40 |
Tonight: Mainly cloudy. 30 percent chance of showers early this evening. Clearing near midnight. Wind north 20 km/h gusting to 40 becoming light this evening. Low plus 2.
Weather: Gull Bay (local forecast), as of 3:02 a.m. EDT
Sun and moon
- Civil dawn
- 7:35 a.m.
- Sunrise
- 8:07 a.m.
- Sunset
- 7:17 p.m.
- Civil dusk
- 7:48 p.m.
- Moonrise
- 6:59 a.m.
- Moonset
- 6:35 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
47% of Black Sturgeon Lake 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 from 1977 records a maximum depth of 48.8 m, drawn from 39 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 60 government surveys (2008–2013) that recorded them.
Forage fish and other species (6)
Forage fish
- Trout-Perch 15
- Emerald Shiner 11
- Spottail Shiner 8
- Logperch 2
Other
- White Sucker 21
- Blackfin Cisco 2
Numbers are the surveys that recorded each species.
Stocking
Lake Trout392,184 fish in 5 years, most recently 2025
All stocking records (5)
| Year | Species | Fish | Stage |
|---|---|---|---|
| 2025 | Lake Trout | 97,867 | Yearlings |
| 2024 | Lake Trout | 70,500 | Yearlings |
| 2023 | Lake Trout | 83,003 | Yearlings |
| 2022 | Lake Trout | 63,784 | Yearlings |
| 2021 | Lake Trout | 77,030 | Yearlings |
Eating your catch
The provincial guide to eating fish (2026) sets limits for 8 species from Black Sturgeon Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 50-55 cm | 8 | 4 | Mercury |
| Lake Whitefish | 45-50 cm | 16 | 16 | Precautionary |
| Northern Pike | 55-60 cm | 12 | 4 | Mercury |
| Smallmouth Bass | 35-40 cm | 8 | 4 | Mercury |
| Walleye | 40-45 cm | 4 | Do not eat | Mercury |
| Burbot (Ling) | 50-55 cm | 12 | 4 | Mercury |
| Cisco (Lake Herring) | 30-35 cm | 16 | 8 | 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 6. Check seasons and limits before you fish.
Getting on the water
6 listed boat launches. marks launches on the map.
Southwest shore
- South West Black Sturgeon Lake
Northwest end
- East Black Sturgeon
- Northeast Black Sturgeon
- Northeast Black Sturgeon
- Northeast Black Sturgeon
- Northeast Black Sturgeon
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.