Costa Rica–Panama border

• It begins at the mouth of the Sixaola River in the Caribbean Sea, following the valley of this river to its influx in the Yorkin River.
• Thence continuing upriver on the bottom of the river valley up to the parallel in the length 9°30'N.
• Then continuing in a straight line to the meridian at 82°58'10"W.
• From there it continues south along this meridian to the summit of the Cordillera de Talamanca, which separates the Caribbean waters and Pacific waters.
• It follows this ridge to Mount Pano where it meets the ridge that divides the waters of the tributaries of the Golfo Dulce and the Charco Azul Bay.
• From here it follows the ridge until the end of Punta Burica on the Pacific Ocean.