Irazu Volcano National Park


The IrazĂș is an active volcano with an irregular subconical shape that stands 3,432 meters high and is accessible by road all year.

It has a long history of eruptions which consist of huge clouds of vapor ash and scoria which the volcano violently spews out. Often these eruptive clouds are accompanied by regional seismic tremors and underground rumblings that can be heard all around the Central Valley.

The first account of an eruption dates from 1723, while the last period of activity lasted from 1962-1965.
At the summit there are four craters, being "Diego de la Haya" the main one. The almost perfectly round main crater measures 1,050 meters in diameter and 250-300 meters deep with very steep sides.

The crater is dormant nowadays, and has a permanent green water lake at the bottom.

The plant life has undergone considerable alteration due to the eruptions. A sparse vegetation grows inside and near the craters. Elsewhere it is possible to see areas of open and stunted vegetation, and areas with secondary forest and the remains of primary forest.

It is often clear in the mornings with clouds building up during the rest of the day. On clear days at the top of its Alto Grande Peak, Irazu has the unusual feature of affording a magnificent view of both the Atlantic and the Pacific oceans together with a large expanse of the mainland.

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Irazu Volcano crater