Fort Union National Monument

  • National Park Service

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Fort Union Information

Fort Union was established in 1851 as a protector of the Santa Fe Trail, and during its forty-year history, three different forts were constructed in total.

The third and final Fort Union was the largest in the American Southwest, and functioned as a military garrison, territorial arsenal, and military supply depot for the southwest. Today, visitors can explore the second fort and the large, impressive ruins of the third Fort Union. The largest visible network of Santa Fe Trail ruts can be seen here.

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