Photo: US Department of Energy/Ed Westcott
The Manhattan Project is one of the most transformative events of the 20th century.
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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.
56 experiences from the National Park Service. Check details on NPS.gov before you go.
Reservation required
Ranger programs and Junior Ranger events are a great way for families and kids to learn about the Manhattan Project in the Tri-Cities while enjoying hands-on activities.
Learn more about Hanford: Join a Ranger Program on NPS.gov (opens in a new tab)
Los Alamos ranger programs are a great way to explore the remarkable history of the Manhattan Project. Call 505-661-6277 to see what ranger programs are available during your visit.
Learn more about Los Alamos: Join a Ranger Program on NPS.gov (opens in a new tab)
Oak Ridge ranger programs are a great way to explore the remarkable history of the Manhattan Project. Follow the link for more information on types of programs and availability.
Learn more about Oak Ridge: Join a Ranger Program on NPS.gov (opens in a new tab)Showing 3 of 3
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Find visitor centers and other services available in the park. Check current hours and availability before you go.
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…
Facility
Located in the city of Richland, this is the main visitor contact point for the Manhattan Project National Historical Park in the Tri-Cities.
Manhattan Project National Historical Park Visitor Center, Richland, WA (509) 376-1647 Directions
Facility
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 where to go in town.
Los Alamos Visitor Contact Station, Los Alamos, NM (505) 661-6277 Directions
Facility
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…
461 W. Outer Drive, Oak Ridge, TN (865) 482-1942 Directions
Today: 9:00AM - 4:00PM · Hanford Visitor Center
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/.
| Monday | 9:00AM - 4:00PM |
|---|---|
| Tuesday | 9:00AM - 4:00PM |
| Wednesday | 9:00AM - 4:00PM |
| Thursday | 9:00AM - 4:00PM |
| Friday | 9:00AM - 4:00PM |
| Saturday | Closed |
| Sunday | 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.
| Monday | 10:00AM - 3:00PM |
|---|---|
| Tuesday | Closed |
| Wednesday | Closed |
| Thursday | Closed |
| Friday | 10:00AM - 3:00PM |
| Saturday | 10:00AM - 3:00PM |
| Sunday | 10:00AM - 3:00PM |
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.
| Monday | Closed |
|---|---|
| Tuesday | 10:00AM - 4:00PM |
| Wednesday | 10:00AM - 4:00PM |
| Thursday | 10:00AM - 4:00PM |
| Friday | 10:00AM - 4:00PM |
| Saturday | 10:00AM - 4:00PM |
| Sunday | 1:00PM - 4:00PM |
No entrance fees listed.
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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.
Join a ranger for a guided walk around Ashley Pond to hear stories about the Manhattan Project including how Los Alamos was selected, the desgn of the first atomic bombs, and what life was like in wartime Los Alamos.
Program availability is dependent on staffing levels and weather conditions. Please check at the Manhattan Project Visitor Center in Los Alamos to see if this program is offered on the day of your visit.
Join a ranger at the Children's Museum of Oak Ridge for a 30 minute walk and talk on the museum grounds as we discuss the importance of Victory Gardens during World War II and the various types of homes that were assembled for the Manhattan Project. This program is free and accessible to all.
Join rangers for a guided walk through the pre-Manhattan Project community of Wheat. As you walk the former townsite, rangers will discuss the families and communities the Manhattan Project displaced in late 1942. Stops include the George Jones Memorial Baptist Church, Roane College site and the Crawford Cumberland Presbyterian Memorial.
The walk is approximately one and a half miles on gravel paths and trails. The trail to the Roane College site includes a slight incline. Wear comfortable shoes and bring water to drink.
Join us on October 8 at the REACH Museum in Richland, WA from 5:00-7:30 pm to celebrate the culmination of a three year-long project to research and document local Black history at the Hanford Site. Hanford History Project, African American Community Cultural & Educational Society (AACCES), and the park collaborated on this project to enhance understanding of African Americans’ contributions to Hanford during the Manhattan Project.
Doors open at 5:00 pm. At 6:00 pm speakers will provide insights into the research process and reflect on the impact of this history. Immediately following community elders will share stories that illuminate this rich history during a fire side chat. Program ends at 7:30 pm. The event is free and refreshments are provided.
Manhattan Project National Historical Park will present a free program in Jackson Square.
Jackson Square, or Town Center No. 1, formed the social and economic center of the wartime community of Oak Ridge. Stroll through the townsite to learn how Oak Ridgers created community in the atomic city.
During the walk, rangers and visitors will discuss what it took to shape Oak Ridge during World War II through routines and traditions brought from near and far.
Program ends at the Jackson Square Tennis Courts right on time for the Tennis Court Dance.
Put on your dancing shoes, another summer of Tennis Court Dances are kicking off on the Jackson Square Tennis Courts. Held monthly on the third Thursday, Manhattan Project National Historical Park recreates the open air tennis court dances held during the Manhattan Project to entertain the 75,000 war workers and their families contained within America’s Secret City.
The dances are an all-ages event, and all are encouraged to participate. Featuring swing music from the 1940s, you might get bit by the jitterbug out on the court. Water, bug repellent and safe footwear is encouraged.
The 2026 Summer Season of Tennis Court Dances will be held on May 21, June 18, July 16, August 20, September 17, and October 15, 2026.
The largest plant site of the Manhattan Project, and the war, K-25 helped isolate the crucial uranium-235 from the more abundant uranium-238. To accomplish that goal, tens of thousands of construction workers relocated to Happy Valley. Learn more about the accomplishments of those workers, and the sacrifices it took to get there, at a ranger walk along the greenways through the former K-25 site.
Distance: 1 mile out and back. Greenway is asphalt. No elevation gain.
Join us for Ride with a Ranger Saturday, October 17 from 9:45 am to 11:00 pm (PDT).
Ride with a Ranger is a 17-mile (27.36 km) round trip ride from Leslie Groves Park along the Sacagawea Heritage Trail, on city streets through the Richland Parkway, and then continuing along the river to the REACH museum. There will be two stops along the route for presentations on the way to the REACH Museum. Check-in begins at 9:45 and the ride leaves at 10:00 am. The bike ride will arrive at the REACH Museum by approximately 11:00 am. Participants will have one hour at the REACH Museum. At 12:00 pm, participants will have the option to ride back to the start of the route with the rangers or return to Leslie Groves Park on their own at any time. Transportation back to the starting point will not be provided.
This event is FREE for registered participants. Event registration opens September 15 and will close on October 15 at 6:00 pm (or once filled). Registration is required. Bike Tri-Cities paid for museum admission for registrants. The suggested minimum age for this ride is 15 years old unless riding in a trailer or a tagalong.
Manhattan Project National Historical Park will present a free program in Jackson Square.
Jackson Square, or Town Center No. 1, formed the social and economic center of the wartime community of Oak Ridge. Stroll through the townsite to learn how Oak Ridgers created community in the atomic city.
During the walk, rangers and visitors will discuss what it took to shape Oak Ridge during World War II through routines and traditions brought from near and far.
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.
Mailing address: National Park Service, Manhattan Project National Historical Park, Denver, CO 80225-0287
Ask about trails, fees, weather, events, or planning your visit.
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