Los Alamos National LaboratoryBradbury Science Museum
Your Window into Los Alamos National Laboratory
Bradbury Science Museum

Public tours for locations of the Manhattan Project National Historical Park

Registration is limited.

The tours are open to U.S. citizens. Proof is required.

Pond cabin

Tour registration and the wait-lists are full.


The U.S. Department of Energy, National Nuclear Security Administration, Los Alamos Field Office, and Los Alamos National Laboratory, partnering with the U.S. Department of Interior, National Park Service, will offer public tours of the Manhattan Project National Historical Park on July 12 and 13 each day at 8:30 and 10 a.m. MDT. The three-hour tours are limited to 25 participants each on a first-come, first-served basis. Tour participants must be at least 18 years of age, U.S. citizens, and provide proof of citizenship, and current photo I.D. at the tour check in. Proof of citizenship includes a U.S. passport, an enhanced driver’s license (Michigan, Minnesota, New York, Vermont, or Washington. Not the same as REAL I.D.), a birth certificate, a Tribal Identification Card, or a U.S. Naturalization Certificate. These morning tours will feature a visit to the Pond Cabin, which served as an office for Emilio Segrè’s Radioactivity Group studying plutonium; a battleship bunker used to protect equipment and staff during implosion design explosives testing, and the Slotin Building, site of Louis Slotin’s criticality accident. Members of the public are invited to register for the tours by visiting this webpage beginning June 29th, 2018 at 10 a.m. MDT.

Required Visitor Information

  • You must be a U.S. citizen and provide proof of citizenship.
  • You must be at least 18 years of age.
  • You must provide current photo identification for tour registration check-in (state issued I.D., state issued driver’s license, or U.S. passport).
  • The tour will involve traversing uneven surfaces, sun exposure, standing for prolonged periods, and lack of access to modern facilities during the tour.
  • You will be under escort during the tour and must stay in groups and designated areas at all times.
  • The tour may be canceled with little advance notice due to factors beyond our control.

What to expect:

Safety and security are vitally important at Los Alamos National Laboratory. Your eligibility to visit a national security site will be verified after you register. As part of the tour, you will receive a visitor badge. During the tour, your visitor badge must be visible at all times. If you misplace the badge, you must notify your escort immediately.

Some frequently asked questions:

Q. What items are prohibited on the tour?
A. You may not bring cell phones, cameras, recording devices, Fitbits, smart watches or Bluetooth accessories, except those associated with medically necessary items. Additionally, following prohibited articles must not be brought on Laboratory property:

  • Nongovernment-owned firearms.
  • Dangerous weapons and explosives (including dangerous instruments or materials likely to cause substantial injury or damage to persons or property). This restriction includes pocket, hunting, or other sharp knives with blades longer than 2.5 inches.
  • Alcoholic beverages.
  • Controlled substances (for example, illegal drugs and associated paraphernalia, but not prescription medication).
  • Items prohibited by local, state or federal law.

Personal items and tour bus are subject to inspection at any time to ensure compliance with requirements as listed above. Unauthorized items discovered during the tour will be confiscated, so please observe LANL policies.

You are encouraged to bring water and sunscreen, although water will only be permitted on the bus. There is no eating or drinking while on the walking portion of the tour. Smoking and vaping are prohibited. 

Q: Can I take photographs on the tour?
A: No. Photography is not allowed at Los Alamos National Laboratory.

Q: What attire should I wear for the tour?
A: Tour participants are required to wear closed-toe, closed-heel, sturdy footwear, and long pants. Long sleeves are advised, but not required. We ask that everyone bring a hat to protect against the sun.

Q. Can I wear shorts and sandals on the tour?
A. No. If you arrive in shorts and sandals (or any other footwear that is not sturdy, closed-toe, and closed-heel), we will unfortunately not be able to allow you to go on the tour.

Q. Will I have to walk long distances?
A. No. However, everyone on the tour must be able to stand for at least 30 minutes and should be able to traverse uneven terrain for up to 100 feet.

Q. What will the weather be like?
A. Expect temperatures in the 80s and above, with low humidity. As a precaution, you should be aware that Los Alamos, New Mexico is above 7,300-feet of elevation. Altitude sickness is not uncommon for those not acclimated to high altitudes. In the event of inclement weather, the tour may be canceled.

Q. Are there hazards involved?
A. Yes. The area of the tour, Technical Area 18, is a former industrial site. We have taken safety precautions, however, you are responsible for your well-being. Please be careful when walking, listen to your escorts, follow all instructions, and always pay attention to what is going on around you. You will receive an extensive safety briefing at the Bradbury Science Museum prior to the tour.

Q. How long is the tour?
A. The tour is approximately three hours long.

Q: How many people can I register?
A: You may register yourself and one other person.

Q. Will there be restrooms?
A. There will be temporary bathroom facilities at the tour site. However, we encourage you to take advantage of a rest break at the Bradbury Science Museum prior to departing on the tour.

Q. If my schedule changes, can I cancel?
A. Yes. We encourage you to email mpnhpregistration@lanl.gov with your name, email, and tour time to cancel your registration. 

Q. How do I know I have successfully registered for a tour?
A. You will receive a confirmation email.

Q. What if I am wait-listed?
A. We anticipate high volume for these tours. If the tour date and time you have selected is full at registrant capacity, you will have the option to add your name and email to a limited capacity wait-list. You are also welcome to try to secure a seat on another tour. For those successfully added to a wait-list, if a ticket becomes available, you will be contacted automatically with further instructions on how to reserve your ticket. Check your email frequently. You will have a limited amount of time to respond.

Q: When will the next tours be available?
A: No additional tours are scheduled at this time. Stay tuned to the Manhattan Project National Historical Park pages for further information.

Q. Where can I get information on the Manhattan Project National Historical Park?
A. The National Park Service website.

Proof of U.S. citizenship
The following documentation will be accepted to establish U.S. citizenship for all tour participants for badging purposes:

  • A U.S. passport: must be current, signed, and have an easily recognizable photograph (if the photograph does not match due to facial changes, weight gain/loss or hair color, you may be asked to present another form of I.D.) The U.S. passport is the primary and preferred means of establishing U.S. citizenship for both U.S.-born and foreign-born U.S. citizens. Passport cards and official U.S. passports are also accepted. This document may serve to establish both identity and citizenship.
    Note: The Badge Office will accept an expired U.S. passport to establish U.S. citizenship if presented in conjunction with a valid form of photo I.D.
  • A birth certificate: must be an original or state-certified copy bearing a raised, impressed, or multicolored seal of the registrar’s office. Birth certificates should also indicate the record was registered shortly after birth with a state-run office of vital records.
  • Delayed birth certificates: delayed birth certificates are defined as certificates that are registered more than one year after birth. These documents will be accepted in conjunction with the following secondary evidence: baptismal certificates, hospital birth records or affidavits of persons having personal knowledge about the facts of the birth. Other secondary evidence can include early census, school, or family records, newspaper files, or insurance papers. All documents submitted as evidence must be original and certified. Presented documentation will require badge office management approval.
  • An Enhanced Driver’s License: a current, valid Enhanced Driver’s License (EDL) issued by Michigan, Minnesota, New York, Vermont, or Washington. Just as the U.S. passport, this document will serve to establish both identity and citizenship. (This is not the same as REAL I.D.)
  • A Tribal Identification Card: documentation must indicate membership to a federally recognized Native American tribe. Due to the varying nature of tribal I.D. cards, this documentation will require authorization by badge office management.
  • A U.S. Naturalization Certificate: document must be issued by the I.N.S. and must be an original bearing the individual’s photograph and signature. Photocopies will not be accepted.
  • A Military Processing Record—provided that it is an original and reflects U.S. citizenship (DD Form 1966).
  • For citizens born abroad to U.S. parents, a Certificate of Birth (Form FS 545 or DS 1350); or a Report of Birth Abroad of a Citizen of the United States of America (Form FS 240).

The following documentation will NOT be accepted by the Badge Office as proof of citizenship:

  • Social Security Cards
  • Hospital Birth Record or baptismal certificates (unless used to support a delayed birth certificate)
  • Birth Registration document
  • Global Entry Traveler card
  • A PIV identification card issued by a non-Federal government facility