Los Alamos: Pre-Manhattan Sites

The Pajarito Plateau of the Jemez Mountains is rich in history. The area was important to the Ancestral Pueblo people and later homesteaders who used the land for seasonal farming and grazing. In 1917, homesteader Harold H. Brook sold part of his land and buildings to businessman Ashley Pond II. Taking advantage of the area’s recreational opportunities, Pond established the Los Alamos Ranch School for boys on the plateau. The school had 54 buildings, some of which were repurposed for the Manhattan Project and are still in use today. 

Scroll down for sites that existed before the Manhattan Project 

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    Last updated: January 13, 2023

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

    Denver, CO 80225-0287


    Hanford: 509.376.1647
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