The reserve is part of the Jureia-Itatins mosaic, one of the most significant remnants of the Atlantic Forest in Brazil.
The Una River's dark, mineral-rich waters provide a stark visual contrast to the surrounding dense, green vegetation.
The area is home to populations of the endangered coastal jaguars and various endemic bird species.
Sustainable development status mandates that all visitor activities must follow strict waste management and noise control protocols.
The sandbars at the river mouth shift position seasonally due to tidal action and river flow intensity.
The Barra do Una Sustainable Development Reserve is a protected coastal area located in the municipality of Peruíbe, São Paulo, characterized by the confluence of the Una River with the Atlantic Ocean. It is distinct for its focus on environmental preservation and community-based sustainable tourism rather than large-scale commercial development. The terrain consists of preserved Atlantic Forest remnants, mangroves, and a rustic coastline frequented by nature enthusiasts and campers. It serves as a gateway to the broader Jureia-Itatins Ecological Station, which restricts unauthorized access to core preservation zones. Visitors primarily engage in low-impact activities such as birdwatching, river bathing, and beach trekking along undeveloped stretches of sand. The area is specifically known for its primitive camping facilities that emphasize integration with the local ecosystem.
The sand peninsula where the Una River meets the ocean at low tide.
Bring biodegradable insect repellent, as the combination of river and forest environment leads to high mosquito activity.
Carry all waste out with you, as there are no large-scale trash collection services on the remote beach stretches.
Wear water shoes if planning to wade into the river, as the bottom can contain submerged tree roots and sharp shells.
Do not attempt to enter the restricted research zones of the Jureia-Itatins Ecological Station without prior authorization or local guides.
Access may be restricted during periods of extreme weather or high tide events that flood coastal access paths.
Practice 'Leave No Trace' principles, minimize noise to avoid disturbing wildlife, and keep strictly to marked trails to protect the mangrove root systems.
