Two Baird's tapirs walking through the dense green jungle undergrowth.

Explore

Sirena Sector

Sirena Sector is the biological heart of Corcovado National Park. It holds the highest concentration of wildlife in the region.

Photo: tour listing on Viator

Located deep within the Osa Peninsula, the Sirena Sector requires a boat ride or a long hike to reach. A certified guide is mandatory for all visitors entering the area.

Permits are strictly capped at 100 daytime visitors and 80 overnight guests per day. You must secure your entry and guide far in advance. The park is completely closed during October.

Person's fingers holding a tiny lizard with a bright orange dewlap.

Sirena Station

1-3 daysMax 80 overnight

This is the main ranger station for the sector. It provides basic overnight bunk accommodations and a cafeteria. Book overnight stays months in advance. Capacity is strictly limited to 80 people per night.

Spider monkey resting on a branch high up in a green tree.

Sirena Trails

3-6 hours20 km network

A 20-kilometer network of flat, interconnected trails surrounds the station. Tapirs, monkeys, and peccaries are frequently spotted here. Start your hikes at dawn when wildlife is most active before the midday heat sets in.

Two people hiking past a massive tree with large buttress roots.

Rio Claro & Rio Sirena

1-2 hoursNo swimming allowed

These rivers border the sector and empty into the ocean. You can observe bull sharks and crocodiles at the river mouths during high tide. Do not enter the water under any circumstances. Always observe predators from a safe distance.