McMaster Lake
45.4539° N, 77.7578° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)McMaster Lake, Ontario. 45.4539° N, 77.7578° W
Maximum depth 21.3 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/mcmaster-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.
- Lake Partner Program, Ontario Ministry of the Environment, Conservation and Parks. 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).
McMaster Lake is 21.3 m deep at its deepest point, deeper than 62% of the 2,688 surveyed lakes in Ontario. It covers 1.12 km² and lies 3.1 km southwest of Siberia.
Government surveys have recorded 1 fish species here: splake.
- Maximum depth
- 21.3 m
- deeper than 62% of the 2,688 surveyed lakes in Ontario
- Area
- 1.12 km²
- larger than 70% of the 18,731 lakes in Ontario
- Shoreline
- 6.4 km
- longer than 59% of the 18,731 lakes in Ontario
- Water clarity
- 4.8 mSecchi depth, 2005
- clearer than 75% of the 1,251 monitored lakes in Ontario
- Fish species
- 1
- fewer than 100% of the 2,454 surveyed lakes in Ontario
- Elevation
- 312 m
Today on the water
4.9 °C
Observed at Barry's Bay, as of 3:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 12 p.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast 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 15 | W 15 | NW 30 | NW 30 | NW 15 | var. 5 | var. 5 |
| Gusts km/h | 50 | 50 | ||||||
| Waves (est.) m | 0.1 | 0.1 | 0.1 | 0.2 | ||||
| Temp. °C | 2 | 3 | 7 | 11 | 13 | 10 | 5 | 0 |
| Precip. % | 40 | 40 | 40 | 40 | 20 | 20 | 0 | 0 |
Tonight: Partly cloudy with 60 percent chance of showers. Risk of a thunderstorm early this evening. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 2.
Weather: Barry's Bay (local forecast), as of 3:00 a.m. EDT
Sun and moon
- Civil dawn
- 6:49 a.m.
- Sunrise
- 7:19 a.m.
- Sunset
- 6:36 p.m.
- Civil dusk
- 7:05 p.m.
- Moonrise
- 6:11 a.m.
- Moonset
- 5:54 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
33% of McMaster Lake is shallower than 3 m, and 35% 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 records a maximum depth of 21.3 m, drawn from 9 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
- SplakeStocked
Stocking
Splake23,830 fish in 10 years, most recently 2025
All stocking records (10)
| Year | Species | Fish | Stage |
|---|---|---|---|
| 2025 | Splake | 2,000 | Yearlings |
| 2024 | Splake | 1,600 | Yearlings |
| 2023 | Splake | 1,850 | Yearlings |
| 2022 | Splake | 2,000 | Yearlings |
| 2021 | Splake | 2,000 | Yearlings |
| 2020 | Splake | 3,000 | Yearlings |
| 2019 | Splake | 2,000 | Yearlings |
| 2018 | Splake | 2,000 | Yearlings |
| 2017 | Splake | 4,380 | Yearlings |
| 2016 | Splake | 3,000 | Yearlings |
Fishing regulations: Fisheries Management Zone 15. Check seasons and limits before you fish.
Water
Clarity was measured with a Secchi disk in 3 years between 2003 and 2005; the latest annual mean is 4.8 m.
Getting on the water
1 listed boat launch. marks launches on the map.
- Boat launch
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.