Situated within the Tenorio Volcano National Park, the Río Celeste winds, tumbles and crashes through a verdant rainforest. A trip here involves a moderately challenging, one-hour hike through the park’s secondary forest – an effort that is well worth the trip. Two rivers merge into one at Borbollones, a confluence where the minerals from the river and volcano meet and subsequently create the famous blue hue.
In addition to the colorful attraction of the water, the river also has several thermal hot springs and a large waterfall. Dips into the pool at the base of the fall are popular, as are soaks in the hot springs; still, one needs to be wary of the hot water and boiling mud pots, and use caution while exploring the banks of the river.
The Río Celeste is best accessed through Guatuso, about an hour drive from the town La Fortuna. From the park’s entrance, it takes about an hour to hike to the Río Celeste Waterfall.