From the record
“McCourtie Park, originally dalled Aiden Lair, is a recreational park located at 10426 South Jackson Road in Somerset Center, Michigan. It was designated a Michigan State Historic Site in 1991 and listed on the National Register of Historic Places in 1992 under the name W.”
Wikipedia article McCourtie Park, CC BY-SA 4.0.
One of 9 National Register listings published here for Hillsdale County · listed in 1992 · category: Site.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service