Complete information about visiting Fort Union National Monument is now on National Park Planner.
Fort Union National Monument in Watrous, New Mexico, preserves the ruins of one of the largest and most important forts in the southwestern United States during the mid- to late 1800s. During its 40-year existence, three different forts were built at Fort Union. Each one was constructed to keep up with the changing needs of the United States Army.
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Last updated on April 8, 2026
