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A color photo of a mountain bathed in pink light with a pink cloud above it. The foreground is treeless but dark.
A sunrise paints Rattlesnake Mountain pink. The mountain is on the Hanford Reach, which used to be part of a buffer zone for the Hanford Site. Photo credit: NPS/BURGHART

Last updated: December 25, 2021

Contact the Park

Mailing Address:

Manhattan Project National Historical Park
c/o NPS Intermountain Regional Office
P.O. Box 25287

Denver , CO 80225-0287


Hanford: 509.376.1647
Los Alamos: 505.661.6277
Oak Ridge: 865.482.1942

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