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Rio On Pools

A run of granite pools and natural water slides on the Rio On in the Mountain Pine Ridge, easy to reach and swim.

Updated 14 October 2026

Typepool
WhereCayo
Nearest citySan Ignacio
Best seasonDecember to April
Time to allowHalf a day
Getting thereIn the Mountain Pine Ridge Forest Reserve, about 40 km from San Ignacio
EntryReserve entry fee

The Rio On runs across a wide shelf of granite in the Mountain Pine Ridge and has worn it into a set of pools and channels linked by short falls, with smooth chutes between them that work as natural slides. It is shallow, safe by the standards of the other sites here, and easy to reach from the road, which makes it the most family-friendly stop in the reserve. The pine ridge and the hills spread out around it.

What you'll find

  • The granite shelves - a wide slab of rock the river runs across.
  • The pools and chutes - linked basins with natural slides between them.
  • The pine ridge views - open country and hills around the river.
  • The shallow water - safe swimming compared with the deeper falls nearby.

When to go

December to April is the dry season and the best for swimming. After rain the river rises and the chutes become dangerous. Weekends bring local visitors.

What to expect

The granite is extremely slippery and falls are common. Water levels rise fast after upstream rain. Facilities are limited to a car park and toilets that are not always open.

Nearby

Big Rock Falls is north, and Rio Frio Cave is west.

What to pack for Rio On Pools

Chosen from what this place is for. Tap a kit for the full checklist.

  • Broken-in walking shoes or boots - Grip and ankle support matter more than looks; never hike in brand-new boots. Find on Amazon
  • Reef-safe sunscreen - High SPF that will not bleach the coral you are swimming over. Find on Amazon
  • Head torch + spare batteries - Hands-free light is essential; caves are truly dark. Find on Amazon
  • Layers + a waterproof shell - Mountain weather turns fast; a packable rain jacket saves the day. Find on Amazon

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All packing kits

Plan your trip

Where to start if Rio On Pools is going on the list.

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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.

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