If you’re wondering about crocodiles near Casa Roja, you’re not alone—it’s the number one question we get from visitors. In fact, people ask about crocodiles even more than poisonous snakes! So don’t feel strange about your concern. The American crocodile (Crocodylus acutus) is a well-known resident of Costa Rica’s waterways, and its population is protected by law. Unlike the smaller spectacled caiman, which is also found in the area, American crocodiles can grow to impressive sizes—some over 15 feet long.
Most of the crocodiles near Casa Roja live upstream in the brackish waters of the Sierpe River, where they thrive in the vast mangrove system. Many visitors actually enjoy the opportunity to see them while on boat tours through the river. Additionally, there is a year-round population of crocodiles across from Casa Roja, in the permanent ponds on Isla Violín. Some American crocodiles even live in saltwater, with reports suggesting that the largest specimens are found in coastal areas. Since crocodiles are present in both saltwater and upriver, there’s no doubt that they swim in and out of the mouth of the Sierpe River—right in front of Casa Roja. While it’s not common, we do occasionally spot crocodiles on the beach in front of the house.
However, this doesn’t stop locals from swimming at the river mouth, and we have never heard of an attack. In fact, people swim in the Sierpe River upstream as well. That said, locals don’t swim at the exact same location every day at the same time, and they never swim at night. Crocodile attacks in Costa Rica are fairly rare, especially compared to other risks. For context, snake bites and auto accidents happen far more often than crocodile encounters. In reality, the biggest threat to tourists in Costa Rica is traffic accidents—not wildlife.
If you’re traveling south to Casa Roja, one of the best-known places to see crocodiles is the Tarcoles River Bridge, located along the Costanera Highway. This popular tourist stop allows visitors to view crocodiles sunning themselves on the sandbanks below. The bridge has guard rails on both sides, but the west-facing side typically offers the best views. The area also has restaurants, bathrooms, and souvenir shops, making it a convenient place to take a break. If you’re taking a private shuttle to Casa Roja, your driver will gladly stop here so you can see these impressive reptiles up close—from a safe distance.
At the end of the day, being aware and respectful of wildlife is part of the adventure when traveling to the Osa Peninsula. Casa Roja sits in one of the wildest and most biodiverse places on Earth, where nature is in control. If you take the same precautions locals do, your chances of encountering a crocodile up close are slim—but the thrill of knowing they’re out there, part of the incredible ecosystem around you, is part of what makes this place so special.
