Big Moon Lake
46.4178° N, 82.8778° W
Depth contours from the 1966 government survey. Not for navigation.
Download the depth map (SVG)Big Moon Lake, Ontario. 46.4178° N, 82.8778° W
Maximum depth 39.6 m (1966 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/big-moon-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.
- 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.
Big Moon Lake is 39.6 m deep at its deepest point, deeper than 88% of the 2,688 surveyed lakes in Ontario. It covers 5.17 km² and lies 11 km north of Blind River.
Government surveys have recorded 18 fish species here, including lake whitefish, lake trout and rock bass.
- Maximum depth
- 39.6 msurveyed 1966
- deeper than 88% of the 2,688 surveyed lakes in Ontario
- Area
- 5.17 km²
- larger than 92% of the 18,731 lakes in Ontario
- Shoreline
- 17.3 km
- longer than 85% of the 18,731 lakes in Ontario
- Fish species
- 18
- more than 94% of the 2,454 surveyed lakes in Ontario
- Elevation
- 231 m
Today on the water
10.8 °C
Observed at Elliot Lake, as of 6:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 10 a.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.
| Time | 7 a.m. | 10 a.m. | 1 p.m. | 4 p.m. | 7 p.m. | 10 p.m. | 1 a.m. | 4 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 10 | NW 20 | NW 20 | NW 20 | var. 5 | var. 5 | E 10 | E 10 |
| Gusts km/h | 40 | 40 | 40 | |||||
| Waves (est.) m | 0.1 | 0.2 | 0.2 | 0.2 | 0.1 | |||
| Temp. °C | 5 | 9 | 12 | 13 | 11 | 6 | 3 | 1 |
| Precip. % | 30 | 20 | 20 | 0 | 0 | 0 | 0 | 0 |
Today: Cloudy with 30 percent chance of showers early this morning. Clearing near noon. Wind becoming northwest 20 km/h gusting to 40 this morning. High 13. UV index 3 or moderate.
Weather: Elliot Lake (local forecast), as of 6:01 a.m. EDT
Sun and moon
- Civil dawn
- 7:10 a.m.
- Sunrise
- 7:40 a.m.
- Sunset
- 6:55 p.m.
- Civil dusk
- 7:25 p.m.
- Moonrise
- 6:33 a.m.
- Moonset
- 6:14 p.m.
- Moon
- Waning crescent, 1% lit
Depth
38% of Big Moon 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 1966 records a maximum depth of 39.6 m, drawn from 22 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 64 government surveys (2009–2014) that recorded them.
Forage fish and other species (8)
Forage fish
- Rainbow Smelt 13
- Emerald Shiner 9
- Bluntnose Minnow 5
- Creek Chub 4
- Golden Shiner 3
- Mottled Sculpin 3
Other
- White Sucker 5
- Brown Bullhead 4
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 7 species from Big Moon Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 50-55 cm | 8 | Do not eat | Mercury |
| Lake Whitefish | 45-50 cm | 16 | 8 | Mercury |
| Largemouth Bass | 45-50 cm | 8 | Do not eat | Mercury |
| Northern Pike | 55-60 cm | 12 | 4 | Mercury |
| Smallmouth Bass | 35-40 cm | 12 | 4 | Mercury |
| Cisco (Lake Herring) | 50-55 cm | 12 | 4 | Mercury |
| White Sucker | 45-50 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 10. Check seasons and limits before you fish.