Albert Barnes Commentary Joshua 15:6

"and the border went up to Beth-hoglah, and passed along by the north of Beth-arabah; and the border went up to the stone of Bohan the son of Reuben;" — Joshua 15:6 (ASV)

The stone of Bohan - This stone perhaps commemorated some deed of valor belonging to the wars of Joshua (compare 1 Samuel 7:12). The stone was erected on the slope of a hill (see the marginal reference), no doubt one of the range which hounds the Jordan valley on the west. But its exact site is wholly uncertain.