Koosawu Áa
59.6811° N, 133.2292° W
Shoreline and neighbouring water from open government data.
Download the map (SVG)Koosawu Áa, British Columbia. 59.6811° N, 133.2292° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/bc/koosawu-aa/, 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.
- Known BC Fish Observations and BC Fish Distributions, Government of British Columbia. Contains information licensed under the Open Government Licence – British Columbia.
- Recreation Sites and Trails BC: recreation site points, Government of British Columbia. Contains information licensed under the Open Government Licence – British Columbia.
- Wildlife Management Units, Government of British Columbia. Contains information licensed under the Open Government Licence – British Columbia.
- 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).
Koosawu Áa covers 30.9 km², making it larger than 98% of the 4,577 lakes in British Columbia. It lies 17 km east of Atlin.
Government surveys have recorded 5 fish species here, including Arctic grayling, lake trout and lake whitefish.
- Area
- 30.9 km²
- larger than 98% of the 4,577 lakes in British Columbia
- Shoreline
- 55.5 km
- longer than 98% of the 4,577 lakes in British Columbia
- Fish species
- 5
- more than 70% of the 2,793 surveyed lakes in British Columbia
- Elevation
- 915 m
Today on the water
1 °C
Observed at Atlin, as of 12:00 p.m. PDT
choppy Estimated waves, next 12 hours: up to 0.3 m. Around 1 p.m., wind from the north: the north shore is sheltered, waves build toward the south shore.
| Time | 1 p.m. | 4 p.m. | 7 p.m. | 10 p.m. | 1 a.m. | 4 a.m. | 7 a.m. | 10 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | N 20 | var. 5 | var. 5 | var. 5 | var. 5 | var. 5 | var. 5 | S 20 |
| Waves (est.) m | 0.3 | 0.1 | 0.1 | 0.1 | ||||
| Temp. °C | 2 | 3 | 3 | 0 | -2 | -2 | -3 | -1 |
| Precip. % | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Today: Mainly cloudy. 30 percent chance of light snow near noon. Wind north 20 km/h becoming light late this afternoon. High plus 4. UV index 1 or low.
Weather: Atlin (local forecast), as of 12:03 p.m. PDT
Sun and moon
- Civil dawn
- 7:36 a.m.
- Sunrise
- 8:17 a.m.
- Sunset
- 7:01 p.m.
- Civil dusk
- 7:42 p.m.
- Moonrise
- 7:16 a.m.
- Moonset
- 6:19 p.m.
- Moon
- Waning crescent, 1% lit
Fish
Sport fish by the share of the 10 government surveys (1972–1992) that recorded them.
Forage fish and other species (2)
Forage fish
- Slimy Sculpin 1
Other
- Round Whitefish 1
Numbers are the surveys that recorded each species.
Fishing regulations: Region 6 – Skeena. Check seasons and limits before you fish.
Getting on the water
1 listed boat launch. marks launches on the map.
- Surprise Lake Recreation Site