Costa Rica 
Osa Peninsula Ecology


  • Kayak through mangrove forests

  • Protect green and olive ridely sea turtles

  • Explore one of the world's most pristine ecosystems

Explore the Osa Peninsula, one of Earth's great natural treasures. Study coast and rainforest species - from green sea turtles to sloths. Experience the rainforest firsthand.


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Health & Safety

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Planning & Support

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Tuition, Financial Aid, & Fundraising

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Your Fieldwork

Catch & release sea turtles

The Osa In-water Project focuses on Hawksbill and Eastern Pacific green sea turtles. Use safe release nets to capture individual turtles, weigh and measure them, and release them back to the sea. The data will help scientists assess population structure, health status, and in-water habitat use.

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Photo by Sieminski Photography

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Partner Profile

Latin American Sea Turtles (LAST) is a conservation nonprofit dedicated to making sure that populations of humans and sea turtles alike can live in sustainable, ecological balance.  On the Osa Peninsula, LAST has initiated long term studies of olive ridley and green sea turtles. From training park rangers in sea turtle monitoring to partnering with educational organizations like EPI, LAST brings an inclusive and comprehensive approach to the scientific study and conservation of sea turtles.

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