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All Costa Rica Alajuela Poás Volcano

Poás Volcano

A park that allows you to get up close and personal with one of the world's largest open volcanic craters.

Alajuela, Costa Rica

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Poás Volcano caldera before the 2017 eruption   Peter Andersen
National Park information on Poás Volcano   stumpa / Atlas Obscura User
Pavement gouges from debris from the 2017 eruption   stumpa / Atlas Obscura User
Poás Volcano evacuation instructions and damage from the 2017 explosion   stumpa / Atlas Obscura User
Railing damage from flying debris (2017 eruption)   stumpa / Atlas Obscura User
Sulfur in the Poás Volcano, September 2019 (2 weeks before several small eruptions)   stumpa / Atlas Obscura User
View from the Poás Volcano rim, Arenal Volcano can be seen on the far horizon   stumpa / Atlas Obscura User
Poás Volcano caldera, September 2019 (2 weeks before several small eruptions)   stumpa / Atlas Obscura User
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About

Poás Volcano National Park contains the world's largest open volcano, complete with a vibrant greenish-blue to yellow volcanic lake that bubbles and boils. 

Poás is located within a beautiful and lush Central Conservation Area of central Costa Rica that encompasses 6 National Parks and many protected areas. Birds flutter through the heavily vegetated area, including the rare resplendent quetzal, toucans, and hummingbirds. The Poás Volcano sits among rolling hills and is close the coffee farm that sources Starbucks. 

Poás Volcano' future as a National Park began with student Mario Boza, a Costa Rican who visited National Parks in the United States in the 1960s and was inspired. His Master's thesis involved a plan to implement a conservation program for the Poás area. The volcano and surrounding area was granted National Park status in 1971, ensuring the area was protected and could not be developed.

The park complex includes a museum and gift shop, a lecture hall (where everyone hoping to view the caldera from the overlooking viewing platform must take safety training), and hiking trails. The 8,885 ft tall volcano has erupted many times since 1828, most recently in September 2019 and 2017. In April 12, 2017, the park was temporarily closed in apprehension of an eruption. Ash and steam clouds began to form, and a large blast on April 22 threw rocks and debris that damaged the viewing platform and nearby structures.  After this eruption, the local hiking trails (including to Lake Botos, a green high volcano lake) closed and extra infrastructure was put in place for shelter for tourists and employees near the viewing platform. 

The walk up to the viewing platform is 0.3 miles, and hardhats (provided by the park) must be worn. You must be in a group with a guide to go to the viewing platform and you are only allowed a maximum of 20 minutes at the platform. On the walk up, the surrounding jungle becomes thinner and the effects of acid rain from the volcano can be seen readily. The platform offers stunning views of the volcanic crater and sulfur lake. On clear days, another large Costa Rican volcano, Arenal, can be seen in the distance. 

 

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National Parks Volcanoes

Know Before You Go

The site is a National Park and requires an entry fee and brief safety training before you are allowed to visit the caldera rim. Hardhats (provided by the park) are required to be worn at all times. The path to the viewing platform is paved and is 0.3 miles each way. Nearby hiking trails have been closed for several years due to eruptions. A strong sulfur smell is always present and can bother those who are sensitive.

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January 28, 2026

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  • https://factcheck.afp.com/
  • https://en.wikipedia.org/wiki/Po%C3%A1s_Volcano_National_Park
  • https://en.wikipedia.org/wiki/Po%C3%A1s_Volcano
  • https://en.wikipedia.org/wiki/Po%C3%A1s_Volcano
  • https://en.wikipedia.org/wiki/Po%C3%A1s_Volcano_National_Park
Poás Volcano
Alajuela Province, Alajuela, Costa Rica
Alajuela
Costa Rica
10.198284, -84.234075

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