Unknown Lake
48.9811° N, 88.7221° W
Depth contours from the 1987 government survey. Not for navigation.
Download the depth map (SVG)Unknown Lake, Ontario. 48.9811° N, 88.7221° W
Maximum depth 25 m (1987 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/unknown-lake-near-cameron-falls/, 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.
- 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.
Unknown Lake is 25 m deep at its deepest point, deeper than 73% of the 2,688 surveyed lakes in Ontario. It covers 0.75 km² and lies 11 km southwest of Eagle Mountain.
Government surveys have recorded 9 fish species here, including brook trout.
- Maximum depth
- 25 msurveyed 1987
- deeper than 73% of the 2,688 surveyed lakes in Ontario
- Area
- 0.75 km²
- larger than 61% of the 18,731 lakes in Ontario
- Shoreline
- 3.4 km
- shorter than 68% of the 18,731 lakes in Ontario
- Fish species
- 9
- more than 69% of the 2,454 surveyed lakes in Ontario
- Elevation
- 357 m
Today on the water
3.9 °C
Observed at Dorion, as of 10:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 8 p.m., wind from the southeast: the southeast shore is sheltered, waves build toward the northwest shore.
| Time | 11 a.m. | 2 p.m. | 5 p.m. | 8 p.m. | 11 p.m. | 2 a.m. | 5 a.m. | 8 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | var. 5 | SE 10 | SE 10 | SE 20 | SE 20 | SE 20 | SE 20 | SE 20 |
| Gusts km/h | 40 | 40 | 40 | 40 | 40 | |||
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.2 | ||||
| Temp. °C | 8 | 13 | 12 | 9 | 9 | 8 | 6 | 9 |
| Precip. % | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Today: Clear. Becoming a mix of sun and cloud this morning. High 13. UV index 3 or moderate.
Weather: Dorion (local forecast), as of 10:02 a.m. EDT
Sun and moon
- Civil dawn
- 7:34 a.m.
- Sunrise
- 8:06 a.m.
- Sunset
- 7:16 p.m.
- Civil dusk
- 7:48 p.m.
- Moonrise
- 6:59 a.m.
- Moonset
- 6:35 p.m.
- Moon
- Waning crescent, 1% lit
Depth
25% of Unknown Lake is shallower than 3 m, and 30% is deeper than 10 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 1987 records a maximum depth of 25 m, drawn from 27 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 (2008–2013) that recorded them.
Forage fish and other species (8)
Forage fish
- Northern Redbelly Dace 14
- Northern Pearl Dace 10
- Fathead Minnow 8
- Brook Stickleback 7
- Iowa Darter 3
- Lake Chub 3
- Johnny Darter 2
Other
- White Sucker 29
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 2 species from Unknown Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Brook Trout | 30-35 cm | 16 | 12 | Precautionary |
| White Sucker | 40-45 cm | 16 | 8 | 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 6. Check seasons and limits before you fish.
Getting on the water
1 listed boat launch. marks launches on the map.
- Unknown Lake Access