It originates from the Imataka Mountains in Guyana,[1] flowing for approximately 340 kilometres (210 mi) before entering Venezuela about 80 kilometres (50 mi) from its mouth.

Early recorded explorations of the Barima were made by Robert Hermann Schomburgk, which was mapped as far as the tributary Rocky River.

[2] The head of the Barima rises in a steep gorge of the Imataka mountains, 950 ft (290 m) above sea level.

[1] Mabaruma,[3] Koriabo,[4] and Morawhanna are Barima-Waini Region communities on the Barima River.

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