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Visit the Magical Río Celeste Waterfall in Costa Rica

The Río Celeste Waterfall in Costa Rica is one of the country’s most breathtaking natural wonders. Located within the Tenorio Volcano National Park, this stunning waterfall is part of a vividly blue river that seems almost too magical to be real. The river gets its name for good reason—”Río Celeste” translates to “Sky Blue River,” and the water is such a brilliant shade of blue that visitors often find themselves questioning if their eyes are playing tricks on them.

So, what causes this remarkable blue hue? The scientific explanation is just as fascinating as the sight itself. The phenomenon occurs when two rivers merge, creating a chemical reaction that makes the water appear bright blue. One of these rivers contains suspended particles of alumino-silicates, and when they collide with the other river, they lay down a visible line of white sediment at the bottom of the confluence.

As these same sediments move downstream, their size and chemical properties perfectly reflect sunlight in such a way that only the blue spectrum is visible, giving the river its otherworldly color.

Visitors to Río Celeste should be aware that the river doesn’t always showcase its famous blue color. While it is most vividly blue during the dry season, from December through April, Costa Rica’s unpredictable tropical weather can make the river appear muddy and brown at any time. Even in the so-called dry season, rains can sweep through the area, altering the river’s appearance.

The locals often say it rains cuando Dios quiere—“when God wants”—so there are no guarantees. However, catching Río Celeste in its vibrant blue glory is well worth the effort and timing.

The Río Celeste Waterfall is one of the highlights of any trip to Tenorio Volcano National Park. The trail leading to the waterfall is about a 4-mile round trip hike, which takes visitors through lush rainforest filled with wildlife, and of course, the unforgettable sight of the brilliantly blue river and waterfall.

Make sure to wear sturdy shoes and be prepared for some muddy paths, especially if visiting during the rainy season. However, whether you encounter a blue river or not, the park’s natural beauty and the charm of the waterfall will leave a lasting impression on any adventurer.

Click here to read more about Río Celeste in The Tico Times.

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