From the record
“The Black Oak Cemetery is a historic cemetery in a remote area of Washington County, Arkansas, southwest of Greenland. It is located on a knob of land at the southern end of a north-south ridge east of Miller Mountain, and is best accessed via spur road running northward from Illinois Chapel Road west of Arkansas Highway 265.”
Wikipedia article Black Oak Cemetery, CC BY-SA 4.0.
One of 160 National Register listings published here for Washington County · listed in 1998 · category: Site.
Sources: the Wikipedia article · the National Register database, National Park Service