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Land is saved...
Learning is shared...Forever: Thousand Islands Watershed Land Trust
Learning is shared...
Learning is shared...Forever: Thousand Islands Watershed Land Trust
Life is protected...
Life is protected...Forever: Thousand Islands Watershed Land Trust
Legacies can be preserved...
Legacies can be preserved...Forever: Thousand Islands Watershed Land Trust


Nature’s Treasures


Natural Classrooms


Wildlife and You


Time, Land, Wealth and Wisdom

“4EVER” is our promise to protect lands entrusted to us … Forever!

Thousand Islands Watershed Land Trust (TIWLT) is situated at what is likely the most important migratory crossroads in all of North America. With the advance of climate change and disappearing wilderness, we need to protect land, life and legacies, and help people learn how they can help.

Please explore each of Land, Learning, Life and Legacies, but first take a few minutes to watch our short TIWLT introductory video. You’ll discover many ways that you, your family and friends can support TIWLT and make a 4EVER difference!

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Current Campaign

In 2022, TIWLT began a 5-year, $5 million conservation plan. Property and funds acquisition is progressing well but there is still “miles to go before we sleep”. Protecting properties 4ever requires generous donors and volunteer help and you can be assured that choosing TIWLT is the best choice. We are the only land trust focused solely on the Thousand Islands Watershed and we have very little overhead; which means more of your donation goes to property acquisition than elsewhere.  These are a few of our properties and we hope you will support us!.

TIWLT 4ever Properties

Blueberry Island

Many boaters in the 1000 Islands have passed Blueberry Island and wondered why it has never been built on? No camp site. No dock. In 2003, Sandy Gregory, the generous owner, felt it was best left alone as a protected wildlife stopover and visual River gem. He left it to TIWLT to protect 4ever.

Glen Elbe Learning Centre

What is now the Glen Elbe Learning Centre was left to TIWLT by a generous woman named Jane Topping. We’ve unravelled 200 years of history here with more to come. The 111 acre property features heritage flower and vegetable gardens, a Climate Change Arboretum and experiential real-world learning opportunities for students and locals.

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Street’s & Marshall’s Marshes

Near Half Moon Bay in the Admiralty Group of the 1000 Islands, these marshes have been donated to TIWLT by their respective owners. They will now be protected 4ever from human development.

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The Mabee Gift

Hidden away from major roads is this 169-acre headwater property. It is part of the waterflow that is on its way to Charleston Lake and area. Its wetlands mitigate flooding downstream, filter water and provide homes for many species. It was a gift from Bonnie and Dick Mabee.

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Whip-Poor-Will Woods

TIWLT Executive Director, Calder Schweitzer, hiked and assessed the 147 acre property TIWLT calls Whip-Poor-Will Woods before TIWLT offered to purchase it. It’s a key property in the watershed and we are working to protect it 4ever. TIWLT currently has a fundraising campaign in place to cover the costs of this and other important conservation projects. Please support us and help generate matching funds for up to $80,000, courtesy of two very generous TIWLT supporters. You will receive a tax receipt for your donation.

Calder Schweitzer

Be part of 4EVER!

Support us now!