Swimming in the Natural Infinity Pools of Rio Agrio in Bajos del Toro

Bajos del Toro is home to some of Costa Rica’s most spectacular natural landscapes, and the natural infinity pools of Río Agrio offer a truly unique swimming experience. These pools are formed by the mineral-rich waters flowing from waterfalls and springs, creating stunning blue-green basins surrounded by dense cloud forest. Unlike artificial pools, these natural formations allow visitors to enjoy a serene swim while taking in breathtaking views of the untouched wilderness. The combination of cool mountain water, dramatic cliffs, and lush vegetation provides a setting that feels otherworldly.

Adventure Guide to Swimming in the Natural Infinity Pools of Río Agrio

Primary Infinity Pool at Río Agrio Waterfall

Location: Near the Río Agrio Waterfall, accessible via a well-maintained private trail.
What Makes It Special: This deep pool is fed by a waterfall with high acidity, giving the water a distinctive bluish hue. The contrast between the greenery and the mineral-rich water creates an incredible backdrop for swimming.
Key Features: Swift currents near the waterfall, so it’s best to stay in calmer sections.

Hidden Pools Along the Río Agrio Creek

Location: A short hike downstream from the waterfall leads to secluded pools.
What Makes It Special: These smaller infinity pools have fewer visitors, providing a peaceful break from the more popular main pool. The surrounding rock formations create natural borders, giving swimmers the feeling of floating on the edge of the forest.
Key Features: Varying depths, making them suitable for both wading and deeper swims.

Mineral-Rich Pools Near Pozo Azul

Location: Further along Río Agrio, connected to the Pozo Azul area.
What Makes It Special: The water here has a slightly different mineral composition, creating a brilliant turquoise color.
Key Features: Smooth stone surfaces underwater, perfect for those who want to relax and soak.

Local Insights

Geological Origins: The river’s name, Río Agrio (Sour River), comes from its mildly acidic water due to volcanic minerals.
Biodiversity: Keep an eye out for rare orchids and colorful tanagers in the surrounding trees.

Visitor Tips

Best Time to Visit: Dry season (December – April) ensures clearer trails and better swimming conditions.
What to Bring:
- Sturdy water shoes for slippery rocks.
- Eco-friendly sunscreen to protect the fragile ecosystem.
- Waterproof bag for personal items.
Getting There: A 90-minute drive from San José via Route 126 through Vara Blanca, with scenic views of waterfalls and cloud forest.