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Where We Work

United States

A landscape view of a valley, with steep red canyon wal
Aravaipa Canyon Aravaipa Canyon Preserve in Arizona. © Justin Bailie
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TNC works across all 50 states to conserve the lands and waters on which life depends.

A leading conservation organization in the United States and around the world, TNC works with public and private partners to ensure our lands and waters are protected for future generations.

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United States

North America Priority Landscapes

Learn about these important areas for conservation work that crosses political boundaries.

U.S. Stories

Branches from a massive Montezuma cypress tree extend toward the sky, nearly obscuring an ornate building next to the tree.

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Rooted in Restoration: An Opportunity to Build Back Montezuma Cypress

A love letter to the Montezuma cypress, the iconic national tree of Mexico, and its return to Texas.

Small white-bellied chorus frog perched perched between two wetland reeds.

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Wet and Wild: The Weird, Wondrous and Wicked Cool Creatures in Midwest Wetlands

Wetlands support an incredible diversity of life. Yet they’re in danger: in some states, as much as 90% of wetlands have been destroyed.

Photo of a brushy meadow in foreground, with sunlit, snow-capped mountains in the background and light clouds above in Washington's Tunk Creek Valley.

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Significant Washington Land Returned to the Colville Tribe, Its Original Stewards

In October 2021, the 9,243-acre Figlenski Ranch in Okanogan County was returned to its original stewards, the Confederated Tribes of the Colville Reservation. Here's the remarkable story.

By Owen L. Oliver

Couple, holding hands, walks on a gravel path surrounded by greenery, with a brick house in the background.

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Seeking Higher Ground

First-of-its-kind project helps Staten Island residents choose a safer future.

By Kate Frazer