The Manhattan Project National Historical Park is composed of the three principal locations where work was completed as part of the Manhattan Project: Oak Ridge, Tennessee; Hanford, Washington; and Los Alamos, New Mexico.

Last updated: May 19, 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


(505) 661-6277
This phone number is for the Los Alamos Unit Visitor Center. You may also contact the Oak Ridge Unit Visitor Center at (865) 482-1942, or the Hanford Unit Visitor Center at (509) 376-1647.

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