The Río Coig, also known as the Coyle River, is a watercourse located in the Santa Cruz Province of Argentine Patagonia. It originates in Laguna La Esperanza, near the border with Chile and the famous Ruta Nacional 40. The river flows through a landscape characterized by expansive floodplains and the brown-grey Patagonian bush, creating a remote and starkly beautiful environment. A significant access point for the river is where Ruta Nacional 3, the major highway, crosses the river's floodplain southwest of the small settlement of Puerto Coig. This area provides a potential put-in or take-out location for paddlers. The river's Brazo Sur, or South Arm, is a specific branch noted for its fishing opportunities, with reports of excellent spots. The overall character of the river is one of isolation and vast open spaces, typical of southern Patagonia. Paddlers can expect a flatwater experience through the floodplain areas near RN 3, with the scenery dominated by low-lying vegetation and wide skies. The region's historical significance is tied to the early exploration and settlement of Patagonia, with the river itself bearing names from that era.