Cossayuna Lake

Lake in New York · 684 acres · near Argyle

Cossayuna Lake has 1 boat ramp listed as public.

Invasive species

NYS DEC records zebra mussels (latest 2011), curly-leaf pondweed (latest 2024), Eurasian watermilfoil (latest 2024) and water chestnut (latest 2024) in this water. Clean, drain and dry your boat, trailer and gear before you leave, and do not move water, plants or live bait to another water.

NYS DEC · checked October 18, 2026

Past algal blooms

Harmful algal blooms reported on this water (state reports compiled by U.S. EPA): 2017 to 2020 and 2022.

state reports compiled by U.S. EPA · checked October 18, 2026

Launches

Cossayuna Lake Boat Launch · Boat ramp · near Argyle

Community

Where people who fish, boat and paddle Cossayuna Lake talk about it. Lake associations, clubs and local groups will be added as we find them.

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Wikidata: Q30624111