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.
Quick Facts
Operating Hours
Access to the Hanford B Reactor is by tour only. Separate tours of the Historic Sites are also offered. For more information about tours of the B Reactor, visit http://manhattanprojectbreactor.hanford.gov/. For more information about tours of the historic sites, visit http://tours.hanford.gov/HistoricTours/.
Activities
Getting There
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.
View Official DirectionsContact & Address
Topics & Themes
Things To Do
Hanford: Attend a B Reactor Tour
The US Department of Energy provides guided tours of the B Reactor. These tours provide a glimpse into the science…
Los Alamos: Tour Behind the Fence
Take a tour behind the fence of the Los Alamos National Laboratory.
Oak Ridge: Join a Ranger Program
Oak Ridge ranger programs are a great way to explore the remarkable history of the Manhattan Project. Follow the link…
Oak Ridge: Experience a Guided Tour Behind the Fence
Guided bus tours of Manhattan Project sites in Oak Ridge provide visitors an intimate behind-the-scenes glimpse of some of the…
Hanford: Visit the Museum at Keewaydin
Located in Kennewick's oldest park, the Museum at Keewaydin shares the history of east Benton County and communities that were…
Hanford: Visit LIGO
The Laser Interferometer Gravitational-wave Observatory (LIGO) is a modern example of cutting-edge research that has ties to the Hanford Site.…
Visitor Centers
Hanford Visitor Center
Located in the city of Richland, this is the main visitor contact point for the Manhattan Project National Historical Park in the Tri-Cities.
Hours: 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 set to begin Spring of 2025. 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/.
Los Alamos Visitor Center
At the Los Alamos Visitor Center you can speak with park rangers, tour exhibits about the Manhattan Project in Los Alamos, and learn more about…
Hours: The Los Alamos Visitor Center operates with the support of volunteers. Hours are subject to change due to staff schedules, weather, and other factors.
Oak Ridge Visitor Center
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,…
Hours: The Oak Ridge Visitor Center is located in the Children's Museum of Oak Ridge. Visitor Center services are limited on Sundays, but brochures, maps, and site films are available. The Visitor Center is closed on: New Year’s Eve, New Year's Day, Easter, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, Christmas Eve, and Christmas Day.
Tri-Cities Visitor Center
Visit Tri-Cities is the tourism information center for the local area. This is a great place to stop by for helpful trip-planning advice for visiting the park and…
Hours: Standard operating hours.
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