The border starts in the west at the Saudi tripoint on the Wadi Al-Batin, and then follows this wadi as it flows north-eastwards. The border then turns east, following a straight line for 32 km (20 m), before another straight line veers to the south-east for 26 km (16 m), terminating at the coast by the junction of the Khawr Abd Allah and Khor as Subiyah opposite Hajjam Island.