The hill of Bashan is a mountainous region or prominent mountain associated with Bashan. The supplied material identifies it probably with Hermon, which lies north of Bashan.
The expression occurs in Psalm 68:15, where it serves as the biblical designation of the mountain or highland associated with Bashan.
The identification with Hermon is presented as probable rather than certain. Hermon is described as lying to the north of Bashan.