Tilden Lake
46.6269° N, 79.6601° W
Depth contours from the 1971 government survey. Not for navigation.
Download the depth map (SVG)Tilden Lake, Ontario. 46.6269° N, 79.6601° W
Maximum depth 21.3 m (1971 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/tilden-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.
- 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).
- 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.
Tilden Lake is 21.3 m deep at its deepest point, deeper than 62% of the 2,688 surveyed lakes in Ontario. It covers 4.32 km² and lies 12 km southeast of Marten River.
Government surveys have recorded 1 fish species here: lake trout.
- Maximum depth
- 21.3 msurveyed 1971
- deeper than 62% of the 2,688 surveyed lakes in Ontario
- Area
- 4.32 km²
- larger than 90% of the 18,731 lakes in Ontario
- Shoreline
- 36.6 km
- longer than 94% of the 18,731 lakes in Ontario
- Water clarity
- 1.9 mSecchi depth, 2019
- less clear than 86% of the 1,251 monitored lakes in Ontario
- Fish species
- 1
- fewer than 100% of the 2,454 surveyed lakes in Ontario
- Elevation
- 283 m
Today on the water
8 °C
Observed at North Bay, as of 9:00 a.m. EDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 11 a.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 | NW 15 | NW 20 | NW 20 | NW 20 | var. 5 | SE 10 | SE 10 | SE 10 |
| Gusts km/h | 40 | 40 | 40 | |||||
| Waves (est.) m | 0.1 | 0.2 | 0.2 | 0.2 | 0.1 | |||
| Temp. °C | 6 | 10 | 11 | 9 | 7 | 3 | 0 | 2 |
| Precip. % | 30 | 30 | 20 | 0 | 0 | 0 | 0 | 0 |
Today: Cloudy with 40 percent chance of showers this morning and early this afternoon then a mix of sun and cloud. Wind becoming northwest 20 km/h gusting to 40 late this morning. High 11. UV index 2 or low.
Weather: North Bay (local forecast), as of 9:02 a.m. EDT
Sun and moon
- Civil dawn
- 6:57 a.m.
- Sunrise
- 7:28 a.m.
- Sunset
- 6:42 p.m.
- Civil dusk
- 7:13 p.m.
- Moonrise
- 6:19 a.m.
- Moonset
- 6:01 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
1 low risk
North Bay, as of 9:00 a.m. EDT
Depth
27% of Tilden Lake is shallower than 3 m, and 33% 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 1971 records a maximum depth of 21.3 m, drawn from 35 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 Trout20,971 fish in 10 years, most recently 2025
All stocking records (10)
| Year | Species | Fish | Stage |
|---|---|---|---|
| 2025 | Lake Trout | 1,000 | Yearlings |
| 2024 | Lake Trout | 1,000 | Yearlings |
| 2023 | Lake Trout | 1,000 | Yearlings |
| 2022 | Lake Trout | 3,000 | Yearlings |
| 2021 | Lake Trout | 1,000 | Yearlings |
| 2020 | Lake Trout | 4,996 | Yearlings |
| 2019 | Lake Trout | 5,725 | Yearlings |
| 2018 | Lake Trout | 1,000 | Yearlings |
| 2017 | Lake Trout | 1,250 | Yearlings |
| 2016 | Lake Trout | 1,000 | Yearlings |
Eating your catch
The provincial guide to eating fish (2026) sets limits for 1 species from Tilden Lake. Maximum meals per month:
| Species | Length | General population | Sensitive population* | Contaminant |
|---|---|---|---|---|
| Walleye | 40-45 cm | 2 | Do not eat | 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 11. Check seasons and limits before you fish.
Water
Getting on the water
1 listed boat launch; 1 with parking listed. marks launches on the map.
- Boat launch