Within Fray Jorge's 10.000 hectares the visitor can distinguish three ecosystems, arid, semi arid and forested, the last of which is found above 600 meters .
The tour stops at the Visitor Center for an introduction to the Park before climbing 560 meters to the top of the hill for a guided forty minute walk during which the cinnamon, myrtle and olivillo trees can been seen growing above a carpet of ferns. This unusual abundant vegetation can grow in this area because of the coastal clouds (or camanchaca), which forms due to the cold moisture-laden air coming off the ocean and condensing upon hitting the high ridge. The high altitude vegetation takes advantage of the moisture in the clouds, allowing a forest typical of Southern Chile to survive in the arid north.