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Fort Union National Monument is 8 miles northwest of Watrous on New Mexico Highway 161, near the junction of the Cimarron and Mountain routes. Fort Union was the foremost military post of the Santa Fe Trail from 1851-1891, and for a time it was the largest American military post in the Southwest.

Founded primarily to protect the Trail, the original wood structures had already deteriorated by the Civil War. At that time, a second, star-shaped, earthen fortification was built. After the Civil War, a third Fort Union was completed which included a garrison and a traditional post, a regional quarter master depot and an arsenal on the site of the first fort.

The adobe ruins of the third fort and extensive Santa Fe Trail ruts comprise the bulk of the national monument, a National Park Service area that is open to the public.


Additional Fort Union photographs:
Thumbnail of Fort Union National Monument, New Mexico, links to another view of the site.
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Thumbnail of a third view of Fort Union National Monument, New Mexico, links to another view of the site.
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Thumbnail of a forth view of Fort Union National Monument, New Mexico, links to another view of the site.
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Thumbnail of a fifth view of Fort Union National Monument, New Mexico, links to another view of the site.
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Thumbnail of a sixth view of Fort Union National Monument, New Mexico, links to another view of the site.
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