Sirena Biological Station

Sirena Biological Station

Along the southwestern coast of the Osa Peninsula, inside of Corcovado National Park, is where you'll find the Sirena Biological Station (Estacion Biologica Sirena). Unquestionably one of the most rugged and extreme areas in the country, Sirena provides the ideal location to witness amazing biodiversity. All it takes is a phone call to the park headquarters in Puerto Jimenez to reserve your spot in this amazing wilderness.

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The modestly priced facilities can accommodate around 20 people. Those who get priority include scientists and researchers, so it pays to reserve ahead of time. Check with the Puerto Jimenez park headquarters for current information on the park and Sirena availability. Lodging, camping, water and restrooms are all available at the Sirena Biological Station.

Those who do get the opportunity to stay in Sirena and explore Corcovado have one of the wildest frontiers at their doorstep. Allow plenty of time for discovery, as the park deserves at least 2-3 days, if not more. All the ranger stations in the park are linked by a web of trails that provide access to the area&s most scenic natural beauty and the opportunity to see the wildlife that the park is known for. Included are all five cat species found in Costa Rica, monkeys, crocodiles, sloths, peccaries, giant anteaters and tapirs. Birders should have an excellent shot of observing some of the 400 species of birds that have been recorded in the area, including the rare harpy eagle and Costa Rica's largest population of the magnificent scarlet macaw.

The sole highway (245) which twists and turns its way around the Osa Peninsula eventually ends in Carate, directly east of Sirena. There are two small airstrips in Sirena and Carate. Local flights depart regularly from many of the favorite destinations in Costa Rica's South Pacific region.

Trips to Inspire

Sirena Biological Station itineraries from local insiders

Explore hand-picked Sirena Biological Station itineraries designed by local insiders who know every hidden corner. Each trip is completely flexible, customized to your pace, travel style, and budget.

23 days | $$

On the Road to Pura Vida

Emmett & Bridgette explored Costa Rica’s diverse landscapes on an extensive self‑drive adventure. From Corcovado’s rain‑soaked forest and Cabo Blanco’s coastal cliffs to Rio Celeste’s cloud‑forest, they hiked, kayaked mangroves, and floated down turquoise rivers. Friendly local guides shared conservation stories, letting both leave with a deeper respect for Costa Rica’s wild heart and its sustainable rhythms.

On the Road to Pura Vida

Costa Rica

11 days | $$

Our Endless Summer Days

Anywhere.com allowed us to truly enjoy our experience vs. worrying that things weren’t arranged properly. Our 11-day adventure through Costa Rica yielded rich experiences and fond memories.

Our Endless Summer Days

Costa Rica

Tours & Activities

Experiences in Sirena Biological Station

Explore hand-picked Sirena Biological Station tours and experiences led by local insiders, from wildlife encounters to cultural deep-dives.

Lodging & Accommodations

Where to stay in Sirena Biological Station

From boutique lodges to luxury resorts, every Sirena Biological Station accommodation is hand-picked by our local insiders for location, comfort, and character.

Luna Lodge

Hydroelectric power runs Luna Lodge, a 16-room lodge set among tropical rainforest and waterfalls in Costa Rica. Just steps from Carate Beach and Playa Madrigal, the property provides 24-hour electricity from its hydro system. Children aged five and above are welcome, though the lodge is not recommended for children under five.

LagunaVista Villas

LagunaVista Villas puts you a short distance from Corcovado National Park, in the wild rainforest of the Osa Peninsula. Private decks have views of the surrounding rainforest, as well as the beach and the nearby lake.

Danta Corcovado Lodge

Set in the South Pacific region, Danta Corcovado Lodge is a family-run farm with lodging options on the Osa Peninsula. Danta Corcovado Lodge offers creatively designed accommodations in a rainforest setting 8 km from Corcovado National Park and with close proximity to the Guaymi Indigenous Reserve.

Casa Drake Lodge

Built and run by a Costa Rican family as part of Los Planes’ sustainable development, Casa Drake Lodge is centrally located on a large, forest filled land at the edge of Corcovado National Park in the South Pacific region.

Jade Mar Cabins

Located in the South Pacific, Jade Mar Cabins overlooks Drake Bay on the north end of Osa Peninsula. World renowned for its biodiversity, Drake Bay is a hub for excursions to the local reserves where visitors can enjoy the rich diversity of flora and fauna.

Casa Horizontes Corcovado

Situated on the rugged Osa Peninsula, Casa Horizontes B&B is only a ten-minute walk from the town of Drake Bay. The Osa Peninsula is Costa Rica’s most southerly extension, and has a multitude of outdoor adventures for visitors to enjoy. One of the major draws to the area is Corcovado National Park, a natural reserve that is home to the largest expanse of lowland tropical rainforest in Central America. The wildlife and biodiversity that has made Costa Rica famous abound in Drake Bay, and visitors come here to experience the exotic tropical ecosystem that dominates the area.

Pirate Cove Hotel

Pirate Cove Hotel lies along the Osa Peninsula in one of Costa Rica's most biologically diverse locations - Drake Bay. For the avid nature lover or the outdoor adventurer, a visit to Drake Bay is the trip of a lifetime, promising encounters with some of the world's most fascinating plant and animal species.

Hotel Jinetes de Osa

Hotel Jinetes de Osa opens directly onto the shore at Drake Bay Beach, placing wilderness trails within a short walk of its 15 guestrooms. This small hotel in Costa Rica maintains front desk hours from 6:00 AM to 8:00 PM daily. Guests receive check-in instructions by email within two weeks prior to arrival, and photo identification alongside a deposit is required at check-in. The property is not wheelchair accessible.

Cabinas El Mirador

Cabinas El Mirador Lodge is situated on a hill overlooking Drake's Bay on the Osa Peninsula of the Pacific Coast of Southern Costa Rica. The El Mirador location is one of the untouched, raw beauty of jungles and beaches alongside exotic and endangered wildlife. Corcovado is a complete ecological treasure and an ideal spot for nature lovers and adventures.

Aguila de Osa Rainforest and Marine Adventure Lodge

Aguila de Osa Rainforest and Marine Adventure Lodge looks out over the Aguitas River from the Drake Bay riverwalk on Costa Rica's Osa Peninsula. This 13-room hotel connects coastal rainforest trails directly to the Pacific. Paid shuttles handle pick-ups from the local airport.

Drake Bay Wilderness Resort

Drake Bay Wilderness Resort runs along the beachfront as a single-level hotel in Costa Rica, where a saltwater pool looks directly over the ocean. The property operates its front desk during limited daily hours, from 7:00 AM to 9:00 PM, and includes elevated balconies and terraces that are unsuitable for small children.

Copa de Arbol

The Copa De Arbol Beach and Rainforest Resort is nestled amongst 70 acres (28 ha) of pristine rainforest reserve along the South Pacific coastline. Between Drake Bay and Corcovado National Park, this luxurious beachfront eco-resort caters to those travelers seeking an “off-the-beaten-path” rainforest and ocean experience.

Flora & Fauna

Flora & fauna in Sirena Biological Station

The wildlife and plant life you might encounter in Sirena Biological Station, from iconic species to the rare finds our local insiders know where to look for.

Armadillo

Armadillo

Flora & Fauna

Baird's Tapir

Baird's Tapir

Flora & Fauna

Bananaquit

Bananaquit

Flora & Fauna

Brown Pelican

Brown Pelican

Flora & Fauna

Chestnut-headed Oropendola

Chestnut-headed Oropendola

Flora & Fauna

Chestnut-mandibled Toucan

Chestnut-mandibled Toucan

Flora & Fauna

Coati

Coati

Flora & Fauna

Mantled Howler Monkey

Mantled Howler Monkey

Flora & Fauna

Humpback Whale

Humpback Whale

Flora & Fauna

Jaguar

Jaguar

Flora & Fauna

Jaguarundi

Jaguarundi

Flora & Fauna

Keel-billed Toucan

Keel-billed Toucan

Flora & Fauna

Kinkajou

Kinkajou

Flora & Fauna

Long-tailed Hermit

Long-tailed Hermit

Flora & Fauna

Magnificent Frigatebird

Magnificent Frigatebird

Flora & Fauna

Margay

Margay

Flora & Fauna

Ocelot

Ocelot

Flora & Fauna

Olingo

Olingo

Flora & Fauna

Agouti

Agouti

Flora & Fauna

Three-Toed Sloth

Three-Toed Sloth

Flora & Fauna

Paca

Paca

Flora & Fauna

Two-Toed Sloth

Two-Toed Sloth

Flora & Fauna

Vampire Bat

Vampire Bat

Flora & Fauna

White-Faced or Capuchin Monkey

White-Faced or Capuchin Monkey

Flora & Fauna

Oncilla

Oncilla

Flora & Fauna

Puma

Puma

Flora & Fauna

Squirrel Monkey

Squirrel Monkey

Flora & Fauna

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