At OSI, we protect land for people, for wildlife, forever. Learn More About Who We Are
A Place for Life.
What We Protect
We protect land that supports the things we can't live without - like clean water, climate protection, and healthy communities - and safeguard the places that make life worth living, like parks for recreation and plant and animal habitat.
How We Do It
Over the past 40 years, we've helped save millions of acres through land acquisition, funding, and research and advocacy. We're also increasing access to the great outdoors through the support of grassroots efforts and park enhancement projects.
New & Noteworthy
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Featured News Open Space Institute Begins MacNaughton Cottage Rehabilitation in the AdirondacksOSI today announced the start of investigative and structural work on the historic MacNaughton Cottage, located at the OSI-owned and managed 212-acre Adirondac Upper Works property in the Adirondacks. The first phase of improvements to MacNaughton Cottage will focus on interior demolition and clean-up to ensure stabilization of this important historic structure.
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Featured News OSI Begins Final Improvement Project at Fahnestock’s Hubbard Perkins Loop TrailThe Open Space Institute (OSI) today announced the start of the final project of their improvement plan for Clarence Fahnestock Memorial State Park—construction of a 65-foot pedestrian bridge and streambank stabilization along the Hubbard Perkins Loop Trail.
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