Private Natural Reserve · Costa Rica
Protecting rainforest, restoring wildlife, and inspiring a deeper connection with the natural world in southern Costa Rica.
About OneK
Where conservation, science, and wilderness come together.
OneK Nature Reserve is located in southern Costa Rica, where streams, waterfalls, and lowland tropical rainforest create habitat for an extraordinary diversity of wildlife. Since 2018, the reserve has focused on environmental conservation, ecological restoration, wildlife rescue, and nature education.
Beyond protecting land, OneK also serves as a field platform for researchers, students, volunteers, and nature lovers who want to experience biodiversity with purpose. Every visit is an opportunity to support the long-term future of this rainforest ecosystem.
Immerse yourself in the rainforest through field exploration, conservation volunteering, and professional research opportunities.
Adventure
Journey into one of the most biodiverse rainforests in Costa Rica, where rivers, waterfalls, and wildlife await around every corner.
ExploreCommunity
Join our conservation team and help protect wildlife, restore habitat, and support the daily work that keeps the reserve thriving.
Get InvolvedScience
Collaborate with OneK through biodiversity surveys, ecological monitoring, field observation, and long-term scientific research projects.
ExploreThousands of species are woven into the living fabric of this rainforest ecosystem.
From pumas, ocelots, and jaguarundi to peccaries and brocket deer, the reserve shelters a dynamic tropical mammal community.
Learn MoreSouthern Costa Rica hosts exceptional avian diversity, and OneK has documented remarkable bird activity across the reserve’s forest, river, and edge habitats.
Learn MoreDiverse ecological niches across the lowland rainforest support highly specialized insect communities and a rich foundation for biodiversity research.
Learn MoreCosta Rica is globally recognized for amphibian and reptile diversity, and OneK provides habitat for species that reflect the ecological richness of the southern Pacific region.
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