Cloud Forest Hike at Juan Castro Blanco National Park. Just an hour and a half from La Fortuna, through the beautiful plains of San Carlos, you will come upon this marvelous place known as the National Park of Water. Surrounded by cloud forests, it stands at more than 2200 meters above sea level where the majority of the main rivers of the Northern Region begin. The naturalist guides, personalized service, and the unique scenery of this area make a perfect combination. book and Save 15%! Cloud Forest Hike at Juan Castro Blanco National Park.