From the record
“Fort Hall was a fort in the Western United States that was built in 1834 as a fur trading post by Nathaniel Jarvis Wyeth. It was located on the Snake River in the eastern Oregon Country, now part of present-day Bannock County in southeastern Idaho.”
Wikipedia article Fort Hall, CC BY-SA 4.0.
One of 30 National Register listings published here for Bannock County · listed in 1966 · category: Site · built in 1834 · a National Historic Landmark.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service