From the record
“The Meinert Ranch Cabin is located 1.8 miles southwest of Red River Hot Springs on Red River-Beargrass Road 234, near Elk City in Idaho County, Idaho. It was listed on the National Register of Historic Places in 1987.”
Wikipedia article Meinert Ranch Cabin, CC BY-SA 4.0.
One of 42 National Register listings published here for Idaho County · listed in 1987 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service