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.
Plan a Visit
Core visitor information on this page is sourced from the National Park Service. NPD proximity sections use NPS reference coordinates and straight-line distance. Local source bundle updated Sep 27, 2026. View the official NPS page.
Weather & Conditions
The Manhattan Project National Historical Park has units in Hanford, WA, Los Alamos, NM, and Oak Ridge, TN. Check local weather conditions at each unit before you visit.
NPS Reference Location
Park state / territory membership: New Mexico, Washington, Tennessee. This map uses the National Park Service reference coordinate. It may represent an administrative or reference point rather than a park entrance, trailhead, visitor center, or the nearest access point. Use the official NPS directions below when planning travel.
Operating 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. 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/.
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
The NPS-listed address may be an administrative office, visitor center, mailing/contact location, or other park facility rather than a park entrance.
Topics & Themes
Things To Do
Hanford: Bike and Walk the Sacagawea Heritage Trail
This recreational trail along the Columbia River is a perfect way to explore the Tri-Cities on foot and bike. Interpretive…
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…
More Things to Do
Additional activities and experiences from the National Park Service.
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. Built on…
Oak Ridge: Visit the Oak Ridge History Museum
The Oak Ridge History Museum, opened in 2019, houses a wealth of exhibits dedicated to the human history of Oak Ridge during…
Hanford: Visit Nez Perce National Historical Park
Since time immemorial, the Nimiipuu (Nez Perce) people have relied on the valleys, prairies, mountains, and plateaus of the Inland Northwest for…
Hanford: Join a Ranger Program
Ranger programs and Junior Ranger events are a great way for families and kids to learn about the Manhattan Project in the…
Alamogordo: Visit the Trinity Site
Two times a year, visitors are allowed to see the place where history was made at the Trinity Site. Run by the…
Hanford: Visit the REACH Museum
At The REACH Museum, you can learn about the natural and human history of the Tri-Cities. The museum houses rotating and permanent…
Hanford: Watch Hanford Made
Watch the Hanford Site film at the Manhattan Project NHP Visitor Center for a general introduction to the Manhattan Project and Hanford’s…
Hanford: Hike the White Bluffs North Trail
On this trail you may explore rolling sand dunes, take in vast vistas dotted with relics of plutonium production during the Manhattan…
Oak Ridge: Enjoy the Community Swimming Pool
The Oak Ridge Community Swimming Pool, constructed during the Manhattan Project, remains a popular feature of the community to this day. Follow…
Hanford: Hike Candy Mountain
The trail up Candy Mountain is a moderate 3.6 mile (5.8 km) roundtrip hike that offers sweeping views of the Tri-Cities region…
Hanford: Become a Junior Ranger
Hey kids! Have you ever wanted to become a park ranger? Join Atom U. Fission on a fun adventure and learn about…
Hanford: Enjoy a Pre-War Historic Sites Tour
Step into the past and learn about the resilient farming communities displaced by the arrival of the Manhattan Project in eastern Washington.…
Showing 18 of 56 NPS Things to Do records available for Manhattan Project National Historical Park.
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.
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…
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,…
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…
Nearby National Park Service Sites
These sites are ordered by straight-line distance between NPS reference coordinates. This is useful for comparison, but it is not road mileage. Trails, parkways, rivers, and distributed units may extend far from their reference point.
Nearby Cities for Trip Planning
These cities are ordered by straight-line distance from the NPS reference coordinate. They are comparison starting points, not official park gateways or road-distance estimates. Trails and other distributed units may extend far beyond this reference point.
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