What are the hours at Manhattan Project National Historical Park?

Mon: 9:00AM - 4:00PM; Tue: 9:00AM - 4:00PM; Wed: 9:00AM - 4:00PM; Thu: 9:00AM - 4:00PM; Fri: 9:00AM - 4:00PM; Sat: Closed; Sun: Closed (Hanford Visitor Center)

Does Manhattan Project National Historical Park require a reservation?

No timed-entry or vehicle reservation is required to enter Manhattan Project National Historical Park. Individual tours, campgrounds, or backcountry permits may still need to be booked separately.

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Is Manhattan Project National Historical Park open right now?

Q: Is Manhattan Project National Historical Park open right now?

As of October 14, 2026, Manhattan Project National Historical Park is open. No active closures or hazards reported.

National Historical Park · NM,WA,TN

Open

Manhattan Project National Historical Park is open.

Why this statusNo active closures or hazards reported.

Last checked Wed, 14 Oct 2026 13:00:58 GMT

Official NPS page ↗ ← Back to the map

The Manhattan Project is one of the most transformative events of the 20th century.

Type: National Historical Park
State: NM,WA,TN
Nearest town: National Park Service

About Manhattan Project National Historical Park

The Manhattan Project is one of the most transformative events of the 20th century. It ushered in the nuclear age with the development of the world’s first atomic bombs. Most of this development took place in three secret communities located in Hanford, WA, Los Alamos, NM and Oak Ridge, TN. Today, you can visit these three sites that make up Manhattan Project National Historical Park.

Read more on Wikipedia ↗ Text from Wikipedia, CC BY-SA.

Visitor info

AddressNational Park Service, Manhattan Project National Historical Park, c/o NPS Intermountain Regional Office, P.O. Box 25287, Denver, CO 80225-0287

Phone(509) 376-1647

Websitewww.nps.gov/mapr/index.htm ↗

Hours

Mon	9:00AM - 4:00PM
Tue	9:00AM - 4:00PM
Wed	9:00AM - 4:00PM
Thu	9:00AM - 4:00PM
Fri	9:00AM - 4:00PM
Sat	Closed
Sun	Closed

Hanford Visitor Center

Getting thereManhattan Project National Historical Park is located in three states: New Mexico, Tennessee, and Washington. For more information on accessing each of these three units, visit our Directions & Transportation page.

ReviewsSee ratings & reviews on Google Maps ↗

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How we read this status

We derive Manhattan Project National Historical Park's status from the National Park Service's own alerts and operating hours, refreshed hourly — this is our reading, not an official determination. As of the last check: No active closures or hazards reported. Full method: how we check park status.