An overnight stay at Sirena Biological Station delivers concentrated rainforest immersion: long guided hikes, a swim in the Claro River, nocturnal walks and early-morning wildlife patrols. Practical, ranger-led camping and strict park rules make this a high-value, low-impact way to experience Corcovado’s rich biodiversity.
More ways to explore the area's outdoor wonders
You push off from Drake Bay as morning light slices the Pacific; the boat nose parts small waves and the forest on the Osa Peninsula leans toward the water as if listening. An hour and a half later you step onto the narrow beach at Sirena Biological Station, where the jungle immediately closes in—humid, green, loud with insect and bird calls.
Difficulty
moderate
Duration
2 days
Fitness Level
Participants should have a moderate level of fitness—able to hike 3–6 hours in a day on uneven, sometimes steep terrain.
Wildlife
History
Corcovado National Park was established in 1975 to protect one of Costa Rica’s last stretches of undisturbed lowland rainforest and the coastal ecosystems of the Osa Peninsula.
Conservation
Park access is regulated to limit impact; follow ranger instructions, pack out waste, and use reef-safe sunscreen to minimize harm to marine and freshwater systems.
Reserve your spot on the Overnight Sirena, Corcovado From Drake Bay today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Start early to increase wildlife sightings
Dawn and dusk are prime wildlife windows—expect early departures and plan to be on the trail by first light.
Use waterproof footwear and gaiters
Trails are often muddy with stream crossings; waterproof shoes and gaiters protect feet and speed up progress.
Bring a reliable headlamp
Lights out early at the station; a headlamp is necessary for late-night movements and early-morning prep.
Carry a reusable water bottle with purification
Hydration stations are limited—carry at least 2 liters and a small filter or purification tablets for longer outings.
Waterproof hiking boots
Keeps feet protected during muddy trails and river crossings.
Lightweight rain jacket
Quick protection from sudden tropical downpours and humidity.
Headlamp with extra batteries
Needed for early starts, night hikes, and campsite tasks after dark.
Insect repellent (DEET or picaridin) & reef-safe sunscreen
Protects against mosquitoes and sun during coastal sections and breaks.