Ḥarrat Khaybar (Arabic: حَرَّة خَيْبَر) is a volcanic field located north of Medina in the Hejaz, Saudi Arabia. It covers an area approximately 12,000 km² (4,600 sq mi). The most recent eruption occurred between 600 and 700 AD. Man-made stone structures dating to the Neolithic period have been studied in Harrat Khaybar.