Fort Fred Steele State Historic Site, Military fort in Carbon County, United States.

Fort Fred Steele was a military post built alongside the North Platte River and positioned near the path of the Union Pacific Railroad. Scattered across the site are foundation remains and partial structures that show where soldiers lived, worked, and managed daily operations.

Fort Steele was built in 1868 where the Union Pacific Railroad crossed the North Platte River, one of three railroad forts on the line. In summer 1868 Generals Grant and Sherman met there while inspecting the railroad. In 1878 troops sent to the White River War were ambushed at Milk Creek, where commander Major Thomas Thornburgh was killed. The fort was abandoned in 1886.

The fort was named for General Frederick Steele, who had recently died when it was established in 1868. Its troops also handled labor disputes in Wyoming and as far away as Chicago, a role beyond railroad guard duty.

The site invites walking and exploration of the ruins across open ground near the river valley. The landscape is relatively flat and accessible, making it easy to move between the scattered remains.

In 1878, during the White River War, the fort sent a contingent that was ambushed with heavy losses at the Battle of Milk Creek; among the dead was the post commander, Major Thomas Thornburgh. Troops from Fort Steele also handled labor disputes in Wyoming and as far away as Chicago.