Shutdown Notice
Due to the lapse in federal appropriations, this website will not be updated until further notice. Where public access to refuge lands does not require the presence of a federal employee or contractor, activities on refuge lands will be allowed to continue on the same terms as before the appropriations lapse. Any entry onto Refuge System property during this period of federal government shutdown is at the visitor's sole risk. Please read this important updated message about the closure of National Wildlife Refuge System facilities during the shutdown, and refer to alerts posted on individual refuge websites for the status of visitor facilities and previously scheduled events that may still occur during the shutdown.

For more information, please visit the Department of Interior webpage at

What's New

Mariana Trench Children's Activity Book

Discover the Mariana Trench with this downloadable activity book.

Activity Book

Northern Islands Submerged Lands Transfer

The Commonwealth of the Northern Mariana Islands, the U.S. Department of Commerce, and the U.S. Department of the Interior formally reached an agreement for the transfer of submerged lands around the islands of Farallon de Pajaros (Uracas), Maug, and Asuncion and associated mineral rights to the CNMI. Check out the fact sheet below for the most recent update on the transfer.

Fact Sheet about the Submerged Lands Transfer

Explore Earth's Deepest Point From Home

Only a handful of people have explored our planet's deepest point, but thanks to experts at NOAA you can now explore the Mariana Trench from the comforts of your own home. Click the link below to learn more.

Learn More

News From the Monument

Check out the latest updates and happenings from around the Mariana Trench Marine National Monument!

Fact Sheet

Monument Fact Sheet

Located in the Mariana Archipelago east of the Philippines,the Marianas Trench Marine National Monument protects approximately 95,216 square miles of submerged lands and waters.

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Advisory Council

Advisory Council

The Mariana Trench Monument Advisory Council (MTMAC) provides advice and recommendations on the development of management plans and management of the monument.

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About the NWRS

National Wildlife Refuge System


The National Wildlife Refuge System, within the U.S. Fish and Wildlife Service, manages a national network of lands and waters set aside to conserve America's fish, wildlife, and plants.

Learn more about the NWRS