From the record
“Fort Laramie was a significant 19th-century trading post, diplomatic site, and military installation located at the confluence of the Laramie and the North Platte Rivers. They joined in the upper Platte River Valley in the eastern part of the present-day US state of Wyoming.”
Wikipedia article Fort Laramie National Historic Site, CC BY-SA 4.0.
One of 7 National Register listings published here for Goshen County · listed in 1966 · category: District · built in 1931.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service