Diamond Lake
45.0738° N, 78.0366° W
Depth contours from the government survey. Not for navigation.
Download the depth map (SVG)Diamond Lake, Ontario. 45.0738° N, 78.0366° 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 Depths are from government surveys and may be outdated.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/diamond-lake-near-bancroft/, 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).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
- Photographs, Wikimedia Commons contributors. Each photo carries its own licence (CC0, public domain, CC BY or CC BY-SA), credited where shown.
Diamond Lake is 21.3 m deep at its deepest point, deeper than 62% of the 2,688 surveyed lakes in Ontario. It covers 1.6 km² and lies 2.7 km east of Highland Grove.
Government surveys have recorded 1 fish species here: lake trout.
- Maximum depth
- 21.3 m
- deeper than 62% of the 2,688 surveyed lakes in Ontario
- Area
- 1.6 km²
- larger than 77% of the 18,731 lakes in Ontario
- Shoreline
- 10.4 km
- longer than 75% of the 18,731 lakes in Ontario
- Fish species
- 1
- fewer than 100% of the 2,454 surveyed lakes in Ontario
- Elevation
- 373 m
Today on the water
2.5 °C
Observed at Haliburton, as of 5:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.3 m. Around 12 p.m., wind from the northwest: the northwest shore is sheltered, waves build toward the southeast shore.
| Time | 6 a.m. | 9 a.m. | 12 p.m. | 3 p.m. | 6 p.m. | 9 p.m. | 12 a.m. | 3 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | W 15 | NW 30 | NW 30 | NW 15 | var. 5 | var. 5 | var. 5 |
| Gusts km/h | 50 | 50 | ||||||
| Waves (est.) m | 0.1 | 0.1 | 0.3 | 0.3 | 0.1 | |||
| Temp. °C | 4 | 6 | 10 | 12 | 11 | 6 | 2 | 0 |
| Precip. % | 40 | 40 | 40 | 20 | 20 | 0 | 0 | 0 |
Today: A mix of sun and cloud. 40 percent chance of showers this morning and early this afternoon. Wind becoming northwest 30 km/h gusting to 50 near noon. High 13. UV index 4 or moderate.
Weather: Haliburton (local forecast), as of 5:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:50 a.m.
- Sunrise
- 7:20 a.m.
- Sunset
- 6:37 p.m.
- Civil dusk
- 7:07 p.m.
- Moonrise
- 6:12 a.m.
- Moonset
- 5:56 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
22% of Diamond Lake is shallower than 3 m, and 34% 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 5 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
- Lake TroutStocked
Stocking
Lake Trout7,365 fish in 10 years, most recently 2025
All stocking records (10)
| Year | Species | Fish | Stage |
|---|---|---|---|
| 2025 | Lake Trout | 705 | Yearlings |
| 2024 | Lake Trout | 660 | Yearlings |
| 2023 | Lake Trout | 750 | Yearlings |
| 2022 | Lake Trout | 750 | Yearlings |
| 2021 | Lake Trout | 750 | Yearlings |
| 2020 | Lake Trout | 750 | Yearlings |
| 2019 | Lake Trout | 750 | Yearlings |
| 2018 | Lake Trout | 750 | Yearlings |
| 2017 | Lake Trout | 750 | Yearlings |
| 2016 | Lake Trout | 750 | Yearlings |
Eating your catch
The provincial guide to eating fish (2026) sets limits for 1 species from Diamond Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Lake Trout | 50-55 cm | 16 | 4 | 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 15. Check seasons and limits before you fish.
Water
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.