From the record
“Humboldt Cave is an archeological site in Churchill County, Nevada. Thirty-one caches were excavated from the cave, but there is only one radiocarbon date of 1953±175 14C BP from the cave, which suggests that Humboldt Cave may have only been a single cultural component.”
Wikipedia article Humboldt Cave, CC BY-SA 4.0.
One of 16 National Register listings published here for Churchill County · listed in 1976 · category: Site.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service