Fort Phil Kearny (Johnson County, Wyoming, Wyoming)

Johnson County, Wyoming · Wyoming · Indian Wars

Quick BriefConstruction of Fort Phil Kearny began on July 13, 1866, under Colonel Henry B. Carrington of the 18th Infantry along the Bozeman Trail in northeastern Wyoming. The fort witnessed the dramatic events of Red Cloud's War between 1866–1868, including the Fetterman Fight in December 1866 when Captain William Fetterman allowed himself and his troops to be lured over a hill north of the fort, and all 80 men in his command were killed by Cheyenne, Arapaho and Oglala Sioux warriors.
Open to visitors
Fort Phil Kearny, Wyoming

History & Significance

Fort Phil Kearny was the largest of the three stockaded fortifications established along the Bozeman Trail in the Powder River Country to protect prospective miners traveling to present-day Montana, at an elevation of 4,700 feet above sea level. Its eight-foot-high log walls enclosed an area of 17 acres.

During construction, Carrington suffered about 50 Indian attacks, losing more than 20 soldiers and civilians. On December 21, 1866, Lakota Sioux and Cheyenne warriors ambushed and killed Captain William J. Fetterman and his entire command of 80 men—the worst U.S. defeat at the hands of the plains Indians until the Battle of the Little Big Horn a decade later.

In the Wagon Box Fight on August 1867, 32 woodcutters and guards were attacked by forces of Oglala Chief Red Cloud but defended themselves with new breech-loading rifles, firing from a corral of wagon boxes and staving off the Indians until help arrived from the fort. By 1868, the Union Pacific Railroad had rendered the dangerous Bozeman Trail obsolete, and all three forts were abandoned as part of the Treaty of Fort Laramie (1868); shortly thereafter, Fort Phil Kearny was burned by Cheyenne Indians.

Key Facts

StateWyoming
LocationJohnson County, Wyoming
Established1866
Decommissioned1868
War / eraIndian Wars
Current statusMuseum / Historic Site
Coordinates44.53222222, -106.8263889
NRHP reference66000756

Map

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🧳 Visiting

What you’ll see when you visit:

  • Historic log stockade walls (reconstructed eight-foot-high fortifications)
  • 1866 Indian Wars era outpost protecting Bozeman Trail miners
  • Strategic site of Red Cloud's War conflict with Northern Plains tribes
  • Museum exhibits on frontier military life and Great Plains history
  • Scenic location in northeastern Wyoming foothills
Best time to visitLate spring through early fall (May-September) offers mild weather and snow-free conditions typical of northern Wyoming's high elevation terrain.
Getting thereFly into Sheridan Regional Airport (SHR), approximately 29 kilometers away, and drive to Johnson County in northeastern Wyoming.
From the nearest major airportCasper-Natrona County International Airport (CPR)🚗 134 mi by road⏱️ ≈ 2 hr 16 min drive

Sources

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