La Leona Station

Close to La Leona Station there are La Leona Eco Lodge Tent Camp to spend the night.La Leona Lodge has a restaurant. There is a trail going from La Leona Operating Centerto Sirena Biological Station. This trail is about 21 km long that takes 6 hours to walk. You have to take tides into account when following this trail, because you need low tide to beable to cross without problems. If you are going to take this hike, you should report it in advance to the Osa Peninsula office.

From Sirena Biological Trails, a trail leads northeast to Los Patos via Corcovado Lagoon.Another trail—only possible at low tide (not least because sharks, mostly hammerheads,like to come up the river mouths in the hours immediately before and after high tide)—leads to the San Pedrillo Ranger Station (25 km). There are three rivers to wade. Thetrick is to reach the Río Sirena and slightly shallower Ríos Llorona before the water isthigh-deep. Here, watch for the crocodiles upstream. Halfway, the trail winds steeply intothe rainforest and is often slippery—good shoes are essential. The last three kilometersare along the beach. The full-day hike takes you past La Llorona, a 30-meter-highwaterfall that cascades spectacularly onto the beach. From San Pedrillo, you can continueanother 10 km to Drake Bay and Marenco Beachfront and Resort Lodge. Tapirs are saidto come down to the beach around sunrise, but you must remain silent at all times, asthe animals are timid and may never return once scared away.

Sirena Biological Station

The Sirena Station is a pleasant place to spend at least a couple of days. There are trails into the forest and along the beach.The Sirena beach is a high energy beach with ripcurrents and bull sharks. The Sirena River is home to a population of crocodiles and dueto its brackish water, bull sharks and sting rays can be found there. Swimming is not advised. However, you can swim in the Claro River.

Rio Sirena Trail:
Flat terrain. The trail measures 1 km. It goes through a second-growth forest that has been regenerating for approximately 20 years.

Rio Pavo Trail:
Flat terrain. The trail measures 3 km and leads to Los Patos Station. Los Patos Station has a camping area. From Los Patos Station there is a way out to the highway, walking two hours and a half. On this trail you can see a regenerating second-growth forest.

Guanacaste Trail:
Flat terrain. The trail is 2 km long and takes about 1 hour to walk it. This trail joins Sirena and Rio Pavo Trails. One of its major attractions is the earpod tree (guanacaste).

Espaveles Trail:
Flat terrain. This is a self-guided trail with interpretative signs along the way and is about 2 km long. Research findings state there are over 14 species per hectare in this sector.

There are other trails, such as Ollas, Rio Claro, and Los Naranjos, going through more rugged terrain.
From Los Patos Trail, the trail south climbs steeply for 6 km before flattening out for thefinal 14 km to the Sirena Research Station. The trail is well marked but narrow,overgrown in parts, and has several river crossings where it is easy to lose the trail onthe other side. You must wade. Be especially careful in rainy season, when you may find yourself hip-deep. There are three small shelters en route. A side trail will take you to Corcovado Lagoon. Allow up to eight hours. Another trail leads from Los Patos to LosPlanes.