Map of Belmont Lake with depth contours

Belmont Lake

44.4951° N, 77.8265° W

Depth contours from the government survey. Not for navigation.

Download the depth map (SVG)

Belmont Lake is 16 m deep at its deepest point, deeper than 50% of the 2,688 surveyed lakes in Ontario. It covers 7.85 km² and lies beside Ashby Mill.

Government surveys have recorded 20 fish species here, including yellow perch, smallmouth bass and rock bass.

Maximum depth
16 m
deeper than 50% of the 2,688 surveyed lakes in Ontario
Area
7.85 km²
larger than 94% of the 18,731 lakes in Ontario
Shoreline
37.8 km
longer than 94% of the 18,731 lakes in Ontario
Water clarity
6.8 mSecchi depth, 2022
clearer than 95% of the 1,251 monitored lakes in Ontario
Fish species
20
more than 96% of the 2,454 surveyed lakes in Ontario
Elevation
186 m

Today on the water

11 °C

Mainly ClearWind W 13 km/h, gusts 35

Observed at Stirling, as of 2:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.4 m. Wind from the west: the west shore is sheltered, waves build toward the east shore.

Hourly forecast, next 24 hours
Time3 a.m.6 a.m.9 a.m.12 p.m.3 p.m.6 p.m.9 p.m.12 a.m.
Wind km/hW 15W 15W 15NW 30NW 30NW 15var. 5var. 5
Gusts5050
Waves (est.) m0.20.20.20.4
Temp. °C66812141395
Precip. %20404040202000

Tonight: Partly cloudy. 40 percent chance of showers this evening. Wind west 30 km/h gusting to 50 becoming light this evening. Low plus 5.

Weather: Stirling (local forecast), as of 2:03 a.m. EDT

Sun and moon

Civil dawn
6:49 a.m.
Sunrise
7:19 a.m.
Sunset
6:37 p.m.
Civil dusk
7:06 p.m.
Moonrise
6:11 a.m.
Moonset
5:55 p.m.
Moon
Waning crescent, 1% lit

Air Quality Health Index

2 low risk

Belleville, as of 1:00 a.m. EDT

Data Source: Environment and Climate Change Canada. Local times.

How waves are estimated

Significant wave height from the forecast hourly wind and the open-water distance (fetch) upwind, using the SMB method (US Army Corps of Engineers Shore Protection Manual, 1984), rounded up to the next 0.1 m. It is not a measurement: gusts, leftover swell and shoals can make water rougher. Under 0.2 m: calm; 0.2–0.5 m: choppy; over 0.5 m: rough.

Depth

The government depth survey records a maximum depth of 16 m, drawn from 79 depth contours.

Not for navigation. Depths are from government surveys and may be outdated.

Fish

Sport fish by the share of the 48 government surveys (2010–2014) that recorded them.

  • Yellow Perch36 of 48
  • Smallmouth Bass34 of 48
  • Rock Bass29 of 48
  • Pumpkinseed26 of 48
  • Walleye17 of 48
  • Northern Pike16 of 48
  • Bluegill15 of 48
  • Black Crappie9 of 48
  • Largemouth Bass8 of 48
  • Cisco2 of 48
  • Muskellunge2 of 48
  • Burbot1 of 48
Forage fish and other species (8)

Forage fish

  • Golden Shiner 9
  • Logperch 8
  • Blackchin Shiner 2
  • Bluntnose Minnow 1
  • Common Shiner 1

Other

  • Brown Bullhead 9
  • White Sucker 4
  • Greater Redhorse 1

Numbers are the surveys that recorded each species.

Eating your catch

The provincial guide to eating fish (2026) sets limits for 11 species from Belmont Lake. Maximum meals per month:

SpeciesLengthGeneral populationSensitive population*Contaminant
Black Crappie20-25 cm88PFAS
Bluegill15-20 cm88PFAS
Largemouth Bass30-35 cm44PFAS
Northern Pike55-60 cm124Mercury, PFAS
Pumpkinseed15-20 cm3212–
Rock Bass15-20 cm124Mercury
Smallmouth Bass35-40 cm4Do not eatPFAS
Walleye40-45 cm4Do not eatMercury
Yellow Perch20-25 cm124PFAS
Cisco (Lake Herring)20-25 cm1212PFAS
White Sucker35-40 cm3216–

* 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 17. Check seasons and limits before you fish.

Water

Clarity was measured with a Secchi disk in 20 years between 1996 and 2022; the latest annual mean is 6.8 m.

Water clarity (Secchi depth, m)
Total phosphorus (µg/L)

Getting on the water

1 listed boat launch; 1 with parking listed. marks launches on the map.