Mountain Ash Lake
47.0539° N, 83.2058° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Mountain Ash Lake, Ontario. 47.0539° N, 83.2058° W
Maximum depth 12 m. Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/mountain-ash-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.
- 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.
Mountain Ash Lake is 12 m deep at its deepest point, shallower than 68% of the 2,688 surveyed lakes in Ontario. It covers 0.94 km² and lies 35 km northeast of Ranger Lake.
- Maximum depth
- 12 m
- shallower than 68% of the 2,688 surveyed lakes in Ontario
- Area
- 0.94 km²
- larger than 66% of the 18,731 lakes in Ontario
- Shoreline
- 9.3 km
- longer than 72% of the 18,731 lakes in Ontario
- Elevation
- 419 m
Sun and moon today
- Civil dawn
- 7:12 a.m.
- Sunrise
- 7:42 a.m.
- Sunset
- 6:56 p.m.
- Civil dusk
- 7:27 p.m.
- Moonrise
- 6:34 a.m.
- Moonset
- 6:15 p.m.
- Moon
- Waning crescent, 1% lit
Depth
46% of Mountain Ash Lake is deeper than 5 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 12 m, drawn from 13 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 Depths are from government surveys and may be outdated.
Getting on the water
1 listed boat launch. marks launches on the map.
- Boat launch