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 t
Free — you won’t need your pass here.
Free entry — there is no entrance fee here, so you won’t need your pass to get in.
- Fee type No fee — No fee is charged here.
- HoursAccess 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 info
- Source National Park Service ↗
- Last verifiedJuly 6, 2026 · Confirmed
- Official pagewww.nps.gov ↗
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.
Common questions
Quick Yes / No / Depends answers for Manhattan Project National Historical Park — always confirm with the managing site before you go.
No Is there a fee at Manhattan Project National Historical Park?
No — it’s free to enter, so you won’t need your pass to get in.
Depends Can you bring a dog?
Usually only leashed and in developed areas, campgrounds, and paved paths — not on most trails or in buildings. Pet rules vary by park, so check first.
No Are drones allowed?
No — launching, landing, or operating drones is prohibited on National Park Service land.
Depends What are the 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 info
Nearby sites
NPS Photo/Sally King National Park Service Bandelier National Monument
ConfirmedYour pass covers the $25 park entrance fee.
Diablo Canyon Recreation Area
ConfirmedThis site is free — no fee is charged, so you won’t need your pass to get in.
