The Fort Union National Monument was established in 1954 to preserve the 19th century Fort Union in Mora County, New Mexico. It is administered by the National Park Service, and while there is no camping at the monument, there are nearby government run campgrounds to the west in the Santa Fe National Forest, and a KOA a short drive south with full amenities.
Historically were three forts in the park area constructed in 1851. The Fort Union National Monument has the remains of the second fort and the ruins of the third fort, as well as traces of the Mountain and Cimarron branches of the old Santa Fe Trail.
The park is situated in a windswept valley with prairie grass stretching out around it.
The site occupies over 700 acres and has a visitor center set at an altitude of 6760 feet with a 1.2 mile trail winding through the ruins of the old adobe forts. The visitor center has restrooms, a large exhibit area, and a short movie providing information on the historic fort and surrounding natural areas. Discover the cultural and military history of the fort and Santa Fe Trail by touring the preserved remnants of the structures, and the remaining wagon trail ruts of the Santa Fe trail while taking in the natural beauty of the surrounding countryside. Mountains soar above the horizon to the west. Pets are allowed on a leash at this national monument.