A full-day guided trek to the famously blue Rio Celeste in Tenorio Volcano National Park, capped by a swim at Llanos del Cortez and a guided sloth sanctuary visit. Expect volcanic geology, muddy tropical trails, and a vivid waterfall worth the effort.
More ways to explore the area's outdoor wonders
You step onto a damp trail under a charcoal canopy and the forest seems to lean in, watching as the river ahead dares you with a color that looks unreal. The Rio Celeste cuts through Tenorio Volcano National Park with a blue so vivid it arrests the breath—a combination of volcanic minerals and chemistry that paints the current the color people travel across Costa Rica to see.
Difficulty
moderate
Duration
8–10 hours
Fitness Level
Should have good cardiovascular fitness and be comfortable hiking 3+ hours on uneven, sometimes steep, tropical terrain.
Wildlife
History
Tenorio’s landscape is shaped by volcanic activity; the river’s blue comes from hydrothermal reactions in volcanic soils rather than algae.
Conservation
The river’s color relies on sensitive chemistry—stay on trails, avoid soap or sunscreen in waterways, and follow park rules to minimize impact.
Reserve your spot on the Rio Celeste Waterfall and Sloth Sactuary Full-Day Tour with Lunch today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Hydrate and fuel up
Carry at least 2 liters of water and snacks—tropical humidity and uphill sections sap energy quickly.
Wear sturdy footwear
Trails are wet and uneven; hiking boots with good traction reduce slip risk on muddy slopes and river crossings.
Start early to avoid rain and crowds
Morning departures minimize afternoon showers and give you calmer light at the waterfall for photos.
Respect wildlife and thermal zones
Stay on marked trails, don’t swim in thermal bubbling areas, and follow guides’ instructions at the sloth sanctuary.
Sturdy hiking boots
Provides traction and ankle support on muddy, rocky trails.
Light rain jacket
Quick showers are common—keeps you dry and warm during downpours.
summer
Insect repellent
Tropical forests have mosquitoes and biting insects, especially near dusk.
summer
Dry bag or zip-locks
Protects electronics and clothing during river crossings or unexpected rain.