Blackstone Lake
51.0505° N, 91.2423° W
Depth contours from the 1982 government survey. Not for navigation.
Download the depth map (SVG)Blackstone Lake, Ontario. 51.0505° N, 91.2423° W
Maximum depth 22 m (1982 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/blackstone-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.
- 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.
Blackstone Lake is 22 m deep at its deepest point, deeper than 66% of the 2,688 surveyed lakes in Ontario. It covers 28.5 km² and lies 66 km west of Rat Rapids.
- Maximum depth
- 22 msurveyed 1982
- deeper than 66% of the 2,688 surveyed lakes in Ontario
- Area
- 28.5 km²
- larger than 98% of the 18,731 lakes in Ontario
- Shoreline
- 242 km
- longer than 99% of the 18,731 lakes in Ontario
- Elevation
- 373 m
Sun and moon today
- Civil dawn
- 6:45 a.m.
- Sunrise
- 7:18 a.m.
- Sunset
- 6:24 p.m.
- Civil dusk
- 6:57 p.m.
- Moonrise
- 6:10 a.m.
- Moonset
- 5:43 p.m.
- Moon
- Waning crescent, 1% lit
Depth
13% of Blackstone Lake 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 1982 records a maximum depth of 22 m, drawn from 87 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 Depths are from government surveys and may be outdated.