The Marino Ballena National Park is created, the zone of which shall be comprised, according to the Dominical-Coronado cartographic sheets at a scale of 1:50,000 and drawn on the cartography at a scale of 1:5,000 of the National Geographic Institute (IGN), starting from the mouth of the Uvita and Morete rivers, at coordinates 1013536.50 N and 526434.54 E, continues along a straight line oriented southwest to a point at coordinates 1011018.74 N and 523848.58 E, to continue southward to coordinates 1005619.11 N and 523853.57 E, to continue the boundary eastward, to a point at coordinates 1005717.83 N and 534217.57 E, located at Punta Piñuela, from this point heading east to boundary marker number M8G whose coordinates are 1005755.39 N and 534479.21 E and which delimits the strip of fifty public meters, demarcated by the boundary markers of the National Geographic Institute; the boundary continues parallel to the beach along said demarcation line heading northwest until finding Estero Negro, to continue bordering and including the mangrove forest (bosque de mangle) of Punta Uvita until finding again the line of the fifty public meters at boundary marker number 100 with coordinates 1013464.69 N and 526546.26 E, continuing the boundary heading northwest to the mouth of the Uvita and Morete rivers, the starting point of this description.
The public zone of the maritime-terrestrial zone (zona marítimo terrestre) of the Marino Ballena National Park is delimited solely through the use of georeferenced coordinates and the placement of boundary markers.