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Several women sit on stools along a long hallway full of dials and meters. Photo: US Department of Energy/Ed Westcott

Manhattan Project National Historical Park

National Historical Park · New Mexico, Tennessee, Washington

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

Plan your visit Directions
  • LocationDenver, CO
  • Entrance No fee listed
  • HoursToday: 9:00AM - 4:00PM
  • Alerts No active alerts

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.

Topics
  • African American Heritage
  • Military
  • Science, Technology and Innovation
  • Tragic Events
  • Wars and Conflicts
  • Women's History
  • World War II
Gray factory building like stacked boxes with single taller smokestack beneath cloudy blue skies.
The B Reactor, located along the Columbia River in Washington, was the world’s first full scale nuclear reactor. — NPS

Things to Do

4 activities. Pick one to find other parks that offer it.

Uniformed park ranger talks animatedly to visitors on a hillside overlooking a sprawling urban area.
A hike with a Hanford park ranger can lead to new insights and perspectives of the local area. — NPS

Plan Your Visit

Hours

Today: 9:00AM - 4:00PM · Hanford Visitor Center

Hours by area (3)
  • Hanford Visitor CenterToday: 9:00AM - 4:00PM

    The Hanford Visitor Center is open Monday - Friday 9:00 AM-4:00 PM. Access to the Hanford B Reactor is suspended due to major construction projects. To check for updates about these tours, visit http://manhattanprojectbreactor.hanford.gov/. Separate tours of the Historic Sites are offered beginning in May. For more information about these tours, visit http://tours.hanford.gov/HistoricTours/.

    Monday9:00AM - 4:00PM
    Tuesday9:00AM - 4:00PM
    Wednesday9:00AM - 4:00PM
    Thursday9:00AM - 4:00PM
    Friday9:00AM - 4:00PM
    SaturdayClosed
    SundayClosed
  • Los Alamos Visitor CenterToday: Closed

    While there is currently no public access to the Department of Energy facilities in Los Alamos, walking tours are available in the town of Los Alamos. The Los Alamos Visitor Center is open Friday through Monday, 10 am to 3 pm.

    Monday10:00AM - 3:00PM
    TuesdayClosed
    WednesdayClosed
    ThursdayClosed
    Friday10:00AM - 3:00PM
    Saturday10:00AM - 3:00PM
    Sunday10:00AM - 3:00PM
  • Oak Ridge Visitor CenterToday: 10:00AM - 4:00PM

    The Oak Ridge Visitor Center is located within the Children's Museum of Oak Ridge. Here you are able to speak with National Park Service rangers, watch a short film on the Manhattan Project, and get literature on Manhattan Project-related historic sites throughout Oak Ridge. Visitor Center services are limited on Sundays, but brochures, maps, and site films are available.

    MondayClosed
    Tuesday10:00AM - 4:00PM
    Wednesday10:00AM - 4:00PM
    Thursday10:00AM - 4:00PM
    Friday10:00AM - 4:00PM
    Saturday10:00AM - 4:00PM
    Sunday1:00PM - 4:00PM

Entrance fees

No entrance fees listed.

Address

National Park Service, Manhattan Project National Historical Park, c/o NPS Intermountain Regional Office
Denver, CO 80225-0287

Get directions Map & directions info

Contact the park

Photos

  • Two-story white house with two small windows, a single door, and flat roof stands in a gravel lot.
    Historic structures endure at Los Alamos, preserving the legacies and untold stories of this important chapter in world history. — NPS
  • Uniformed park ranger points to distance of fountain and trees as visitors sit enraptured.
  • Wooden chair sits amid light blue paneling covered in dials, meters, screens, and buttons.
  • A ranger is surrounded by visitors at a security gate, awaiting a ranger-led walk.

Getting There

National Park Service, Manhattan Project National Historical Park, c/o NPS Intermountain Regional Office
Denver, CO 80225-0287

Manhattan 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.

Get directions NPS directions Official NPS site

Mailing address: National Park Service, Manhattan Project National Historical Park, Denver, CO 80225-0287

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