Twin Lakes Association Donate
Twin Lakes Association · Green Lake County, Wisconsin · Since 2002

A legacy of still water, kept for what flies overhead.

100 acres of open water on the Horicon Marsh flyway — protected by the families who live on it, for the migratory wildlife that pass through.

Protect the flyway Our mission
96¢ of every dollar goes
straight to the water. All-volunteer
501(c)(3) · Est. 2002
01Our mission

To safeguard the tranquil waters and shorelines of Twin Lakes as a legacy for future generations — maintaining a healthy ecosystem that supports the seasonal journey of migratory wildlife traveling the Horicon Marsh path.

02What we protect

On the path from Winnipeg to the Gulf.

Horicon Marsh is the largest freshwater cattail marsh in the United States — and Twin Lakes sits just to the north, directly on the approach. Each spring and autumn, hundreds of thousands of birds move between the marsh and their northern nesting grounds, using our open water to rest, feed, and stage the next leg.

WISCONSIN Lake Winnipeg nesting ORIGIN — 780 MI Twin Lakes YOU ARE HERE · 100 AC Horicon Marsh 33,000 ACRES Illinois River corridor NEXT STOP — 180 MI

The Horicon route

Sandhill cranes, tundra swans, snow geese, and white pelicans all stage on Twin Lakes before dropping into Horicon Marsh — the next stop on the corridor south.

Flyway pathStopover
100 acres
Of open water and shoreline protected across two linked basins.
187 species
Documented over two decades of citizen-science bird counts.
24 years
Of unbroken, all-volunteer stewardship since our founding in 2002.
American White Pelican
American White Pelican
Pelecanus erythrorhynchos
Peak · May–Aug Flock · 200+
Great Egret
Great Egret
Ardea alba
Resident · Apr–Oct Solitary
Trumpeter Swan
Trumpeter Swan
Cygnus buccinator
Winter · Nov–Mar Pair-bonded
Canada Goose
Canada Goose
Branta canadensis
Nests · May–Jun Family · 8–12
03Your gift, returned to the water

Give the lakes another hundred years.

We are an all-volunteer conservancy — no salaries, no overhead creep. Every gift becomes on-the-ground work, measured in water-quality data and species counts, not press releases.

2.4 of 6.1 shoreline miles
Shoreline restoration
Native buffer plantings that stop agricultural runoff before it reaches the water.
14 unbroken years
Water-quality monitoring
Monthly phosphorus, nitrate, and chlorophyll sampling with the Wisconsin DNR.
62 student counters
Citizen science
Local students logging 187 species into Cornell Lab's continental eBird dataset.
96¢ per dollar to programsAudited annuallyGifts tax-deductible

The lakes cannot speak for themselves.

Foundations, eco-partners, and neighbors keep this water clean and this flyway open. Join them.

Make a gift today