Fort Union National Monument

Fort Union
Exposed to wind, within a sweeping valley of short grass prairie, amid the swales of the Santa Fe Trail, lie the territorial-style adobe remnants of the region’s largest 1800s military fort. Between 1851 and 1891, Fort Union acted as an agent of political and cultural change throughout the Southwest.

3115 NM-161
Watrous, NM 87753
United States

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505-425-8025

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Fort Union
Fort Union
Fort Union
Fort Union
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Discover Fort Union National Monument

Fort Union photo

Step onto the windswept plains of northern New Mexico and explore the remnants of Fort Union, once the largest military post in the region. Established in 1851, this fort played a vital role in protecting travelers along the Santa Fe Trail and maintaining a military presence in the Southwest. Today, visitors can walk among the preserved adobe walls, follow wagon ruts from pioneers long past, and imagine life on the frontier. With its rich history, striking landscape, and deep ties to the Santa Fe Trail, Fort Union National Monument offers a fascinating glimpse into the American West.

Bring the parks home

From mugs to ornaments, our keepsakes make perfect gifts for all ages. Every purchase supports the parks!

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Fort Union National Monument Ramsey Mug

$27.99

Fort Union National Monument Cap

$24.99

Fort Union National Monument Collectible Coin

$12.99

Fort Union National Monument Book

$5.99

Historic Cannon Mini Block Set

$10.99
Bookstore with travel guides and souvenirs displayed on shelves.

Visit the WNP park store

The park store is found within the Fort Union Visitor Center. Shop collectibles, books, keepsakes, toys, and more designed to enhance your understanding of this important place. 

Get directions

Ancient adobe ruins under a bright blue sky with scattered clouds.

6 days across the West

Explore historical sites, dramatic landscapes, and the beauty of the American Southwest with this six-day road trip from Oklahoma to New Mexico.

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Visit smart

Walk the Fort Ruins Trail

This self-guided tour takes you through the remnants of barracks, storehouses, and defensive walls.

See the Santa Fe Trail ruts

The original wagon ruts from 19th-century travelers are still visible, preserving a tangible link to the past.

Visit in spring or fall

Summers can be hot and windy, so cooler seasons provide a more comfortable experience.

Stop by the visitor center

Learn about the fort’s military and trade history through exhibits and ranger programs.

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Upcoming events

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A Ghost Story

Nov 1 7:00 pm – 8:30 pm

Good stories don't have to be true! Join rangers to explore a peculiar tale of Fort Union around a campfire followed by a lantern tour. 90-minutes. Gates will open at 6:45 pm for tour participants.

Crackling Embers

Nov 8 10:00 am – 10:45 am

The tradition of storytelling around the campfire continues with your National Park Service! Experience this half-hour program of fire making along with historic tales, an intriguing story, or a spooky yarn along with a park ranger. Seating available...

Ruins Walk

Nov 15 10:00 am – 11:30 am

A 60- to 90-minute, 1-mile journey that enters the ruins, discussing history, fort preservation efforts, and the importance of concentrated impact. (Tour enters rough, unlevel terrain. Park-provided reflective vest required to be worn.)

Thanksgiving Proclamation

Nov 25 10:00 am – 10:45 am

This 45-minute program features an 1863 order from President Lincoln officially marking our famous national holiday.

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Our contribution

Over $162 million

Since our founding in 1938, WNP has provided more than $162 million in aid to our partner parks to fund educational programs, initiatives, and scientific research.

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