Mountsberg Reservoir
43.4602° N, 80.0442° W
Shoreline and neighbouring water from open government data.
Download the map (SVG)Mountsberg Reservoir, Ontario. 43.4602° N, 80.0442° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/mountsberg-reservoir/, 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.
- Real-time hydrometric data, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
- National Water Data Archive (HYDAT) daily means, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
- 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).
- Air Quality Health Index observations and forecasts, 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.
Mountsberg Reservoir covers 1.53 km², making it larger than 76% of the 18,731 lakes in Ontario. It lies 2.2 km east of Badenoch.
Government surveys have recorded 12 fish species here, including largemouth bass, pumpkinseed and black crappie.
- Area
- 1.53 km²
- larger than 76% of the 18,731 lakes in Ontario
- Shoreline
- 7.5 km
- longer than 65% of the 18,731 lakes in Ontario
- Fish species
- 12
- more than 81% of the 2,454 surveyed lakes in Ontario
- Elevation
- 297 m
Today on the water
8 °C
Observed at Guelph, as of 9:00 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 | 10 a.m. | 1 p.m. | 4 p.m. | 7 p.m. | 10 p.m. | 1 a.m. | 4 a.m. | 7 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | W 15 | NW 30 | NW 30 | NW 10 | var. 5 | var. 5 | SE 10 | SE 15 |
| Gusts km/h | 50 | 50 | ||||||
| Waves (est.) m | 0.1 | 0.3 | 0.3 | 0.1 | ||||
| Temp. °C | 11 | 16 | 18 | 13 | 8 | 6 | 4 | 6 |
| Precip. % | 20 | 20 | 20 | 0 | 0 | 0 | 0 | 0 |
Today: Sunny. Becoming a mix of sun and cloud this morning. Wind becoming northwest 30 km/h gusting to 50 near noon. High 18. UV index 4 or moderate.
Weather: Guelph (local forecast), as of 9:02 a.m. EDT
Water level
Mountsberg Creek below Mountsberg Reservoir: 1.13 m at 7:45 a.m. EDT: 3 cm above the median for this time of year, within the normal range.
Normal range (25th–75th percentile, HYDAT) Last 7 days
Provisional real-time data, subject to revision. hydrometric station 02HB032
Sun and moon
- Civil dawn
- 6:58 a.m.
- Sunrise
- 7:27 a.m.
- Sunset
- 6:47 p.m.
- Civil dusk
- 7:15 p.m.
- Moonrise
- 6:19 a.m.
- Moonset
- 6:05 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
Milton, as of 8:00 a.m. EDT
Fish
Sport fish by the share of the 8 government surveys (1970–2022) that recorded them.
Forage fish and other species (4)
Forage fish
- Creek Chub 1
Other
- Brown Bullhead 2
- Green Sunfish 2
- White Sucker 2
Numbers are the surveys that recorded each species.
Eating your catch
The provincial guide to eating fish (2026) sets limits for 2 species from Mountsberg Reservoir. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Largemouth Bass | 30-35 cm | 16 | 12 | Precautionary |
| Northern Pike | 55-60 cm | 16 | 16 | Precautionary |
* 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 16. Check seasons and limits before you fish.