Contact Us


By Mail:
Manhattan Project National Historical Park
c/o NPS Intermountain Regional Office
P.O. Box 25287
Denver, CO 80225-0287

By Phone:

  • Headquarters: 303-969-2700
  • Hanford Site: 509-376-1647
  • Los Alamos Site: 505-661-6277
  • Oak Ridge Site: 865-482-1942

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Last updated: July 23, 2024

Contact Info

Mailing Address:

Manhattan Project National Historical Park
c/o NPS Intermountain Regional Office
P.O. Box 25287
Denver, CO 80225-0287

Phone:

Hanford: 509.376.1647
Los Alamos: 505.661.6277
Oak Ridge: 865.482.1942

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