Arenal Volcano Guided Tour

In truth, this national park has two volcanoes – the 5,437-foot (1,657-meter) Arenal Volcano and the 3,740-foot (1,140-meter) Chato Volcano. The latter has been inactive for nearly 3,500 years and has a collapsed crater that contains a picture-perfect lagoon.

Arenal's most recent eruptive period ran from July 29, 1968 to 2010. On that day in 1968, three craters burst open along the volcano’s western flank. “Crater A” measured 1,000 meters across and set off a pyroclastic flow of toxic gas and hot rocks that spread 12 km, devastating the towns of Pueblo Nuevo and Tabacón. In doing so, it killed 87 people. In September of the same year, “Crater A” began again to emit lava, and remained the most active crater until 1973, when activity migrated to “Crater C.”

Since 2010, however, Arenal's seismicity, explosions and lava flows have decreased significantly: it's dormant, not extinct, but there's no lava to see today. It’s also important to note that on many days clouds obscure the top.

Within the national park, short trails (3.4 km and 2 km) pass through both secondary forest and lava fields from previous eruptions. The park rangers keep a close eye on the volcanic activity, and will not hesitate to close trails or portions of the park if they feel that it is unsafe.

Arenal plays a large role in Costa Rica's power production. Lake Arenal, which rests at the base of the Arenal Volcano, supplies 12 percent of the country's hydroelectric energy. On the opposite side of the lake, wind farms catch strong gales that whip across the Tilarán mountain range, while the Miravalles Volcano Geothermal Plant taps into the area’s volcanic activity for electrical power.

Arenal’s climate is variable. Both the Pacific and Atlantic oceans influence its temperature (which oscillates between 21°C and 27.5°C) and annual rainfall (which averages between 3,500 mm to 5,000 mm). The rainy season lasts from May to January, while the dry season runs from February to April.

What animals are you likely to see while exploring the Arenal Volcano National Park? You might spot deer, tapir, howler monkeys, white-faced monkeys and snakes, or birds like parrots, orioles and brown magpies. Plants include various species of palms and bromeliads (including the endemic specie Pitcaimia Funkiae), guayabo de monte, bait, ceiba, cirri, laurel, higuerones, fungi, orchids, and ferns.

Check out our Arenal Map to view the location of Arenal Volcano National Park.

See our eruption history in photos.

You have a variety of options for trekking through the volcanic jungles of Arenal, but if you want an extra special experience (though it’s hard to top a volcanic adventure), we recommend the Arenal Oasis Night Tour. Explore the rainforest in the evening, and observe the creatures you don’t get to see during the day.

Discover more about Tilarán, Guanacaste, and the diversity of plant and animal life found within this region.

Let the fun continue as you slip into nature’s volcanically heated geothermal bathtub. After a long day of hiking through the natural world, your tired muscles deserve a nice relaxing soak in a hot spring. Costa Rica has plenty, but for added indulgence, book a hot spring hotel and pamper yourself before or after dinner.

Arenal has been dormant since 2010, so this hike explores lava fields and viewpoints from its active decades rather than flowing lava today. Learn how close you can safely get to Arenal Volcano during your expedition.

The Best Guided Tours of the Arenal Volcano often Combine volcano heated Hot Springs!

Arenal Volcano Hike Arenal Volcano Eruption History Walk
Arenal Volcano Walk & Eco Termales Hot Springs
Arenal Volcano Walk and Tabacon Hot Springs