Question: what is the source of the orange river
Answer: Orange Gariep , Oranje , Senqu River Sunset over the Orange River near Upington in the Northern Cape Countries Lesotho , South Africa , Namibia Tributaries - right Caledon River , Vaal River , Fish River ( Namibia ) Landmarks Gariep Dam , Augrabies Falls Source Thaba Putsoa - location Maloti Mountains ( Drakensberg ) , Lesotho - elevation 3,350 m ( 10,991 ft ) Mouth Alexander Bay - location Atlantic Ocean Length 2,200 km ( 1,367 mi ) Basin 973,000 km ( 375,677 sq mi ) Discharge - average 365 m / s ( 12,890 cu ft / s ) The course and watershed of the Orange River , Caledon River and Vaal River .