In Los Alamos, New Mexico, Manhattan Project administrators found an ideal location for the secret laboratory where they designed and built the world’s first atomic weapons. Isolated on top of a mesa, with canyons cutting through the surrounding landscape, this place provided the remoteness they required. Still, Santa Fe was relatively close, giving them access to transportation and other resources.
Drop by our visitor center to start your Manhattan Project National Historical Park experience in Los Alamos. Speak with park rangers, stamp your passport book, pick up a junior ranger book, and learn about ranger programs. Then use our park app to discover places in Los Alamos related to the Manhattan Project.
We offer a traditional NPS passport stamp as well as a unique three-part stamp. Travel to our visitor centers in Los Alamos, Oak Ridge, and the Tri-Cities to receive one-third of a stamp. By the end of your journey, you will have a whole stamp.
Park calendar: Visit our park calendar to learn about ranger programs and special events at each of the park's locations: Los Alamos, New Mexico, Oak Ridge, Tennessee, and the Tri-Cities, Washington.
Los Alamos Places to Go: Visit the Los Alamos Places to Go page to see all the places related to the Manhattan Project that you can explore. This includes our visitor center, historic facilities with the Department of Energy and historic sites and educational centers within Los Alamos.
Los Alamos Things to Do: Visit the Los Alamos Things to Do page to see all the activities related to the Manhattan Project. This includes guided tours, self-guided tours and programs and activities with our park, Department of Energy guided tours, and organizations within Los Alamos.
Self-guided Tours with our App: Download the National Park Service mobile app and go to the Manhattan Project National Historical Park. There you will find information about all the places you can visit as well as information on self-guided tours.
Junior Ranger Program: Our Junior Ranger book is available in-person at our visitor center or on our website. Kids of all ages can complete the book's activities and earn a Junior Ranger certificate, badge, and patch.
Many of the park’s historic properties are located “behind the fence” on secure Department of Energy nuclear reservations. Public access is only permitted though public tours facilitated by the Department of Energy.
Los Alamos Visitor Center: The Los Alamos Visitor Center is wheelchair accessible. The facility is managed by Los Alamos County, which also manages other visitor attractions in the area. Contact them at 505-662-8333 for additional information on accessibility. An audio desciption of the Los Alamos Visitor Center can be found on the National Park Service mobile app and can be viewed in this Audio Description of the Los Alamos Visitor Center PDF.
Outside Safety: Los Alamos may be very hot and dry in the summertime. Drink plenty of water, wear a hat and sunglasses, use sunscreen.
Altitude Sickness: At 7,320 feet (2231 m) above sea level, altitude sickness may affect some visitors. Drink plenty of water and don’t overexert yourself.
Weather:Within the Los Alamos community, visitors can explore different hiking trails, walking tours, museums, ranger programs, and more. Weather in Los Alamos can change quickly, and visitors should plan for changing conditions.Check the weather and current forecast of Los Alamos before you set out for the day.
Los Alamos Visitor Center: Only licensed service animals on a leash are allowed in the Los Alamos Visitor Center.
Los Alamos Historic Walking Tour: Pets can join the walking tour. Pets must be on a maximum six feet (2 m) leash.
Department of Energy: The guided tour of Los Alamos National Laboratory offered by the Department of Energy does not allow any pets.
Pet Boarding Options: If you are planning to explore areas of the park that are closed to pets, we recommend that you contact a local pet care provider. Commercial kennels and pet sitters are available in surrounding communities. Please check local listings. Reservations are strongly advised and may be required.