Fort Union National Monument

Fort Union National Monument

Quick Facts

Fort Union National Monument

New Mexico

(505) 425-8025

Map Directions

Things To Do



Imagine viewing ruins that date back to 1851, when Fort Union was established as the guardian of the Santa Fe Trail. During its forty-year history, three different forts were constructed close together. The third Fort Union was the largest in the American Southwest, and functioned as a military garrison, territorial arsenal, and military supply depot for the southwest. Now, you can embark on a self-guided tour to visit 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.

Map of Fort Union

Latitude, Longitude: 35.908845, -105.014965



  • Hiking

    A 1.6-mile, self-guided interpretive trail enables visitors to tour the ruins. Visitors may opt to do a shorter, half-mile self guided tour as well. Both of these trails are fully-accessible by wheelchair or electric cart.

  • Picnicking

    Established picnic areas are available at this site.



From Albuquerque, Santa Fe or Las Vegas New Mexico, take I-25 north, exit 366 at Watrous, and continue for eight-miles on NM 161.

From Denver, Colorado Springs or Raton Colorado, take I-25 south, exit 366 at Watrous, and continue for eight-miles on NM 161.


Albuquerque, New Mexico or Denver, Colorado, offer the closest airport access to this site.

Phone Numbers


(505) 425-8025