From the record
“The McCarthy Homestead Cabin is a remnant of early settlement in what would become Glacier National Park. Jeremiah McCarthy built the log homestead in the North Fork area in 1908 after completion of the North Fork Road and passage of the Forest Homestead Act of 1906.”
Wikipedia article McCarthy Homestead Cabin, CC BY-SA 4.0.
One of 168 National Register listings published here for Flathead County · listed in 1986 · category: Building · built in 1908, rustic architecture.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service