Travel to the south of the country on the Interamerican highway, about
180 miles from San Jose to Palmar.
South of Palmar about 20 miles you will find the turnoff to the La Gamba Esquinas Rainforest, then Piedras Blancas National Park of Costa Rica
Currently, the only publically accessible entrance to Piedras Blancas National Park is via the town of La Gamba.