Reserva Biológica União wilderness guide
Biological Reserve · RJ

Reserva Biológica União

Reserva Biológica União is a protected biological reserve in Rio de Janeiro, Brazil, known for its exceptional Atlantic Forest biodiversity and strict conservation measures that limit public access.

Biological Reserve24,000

Designation

Biological Reserve

Total Wilderness Area

24,000

Elevation / Terrain

Diverse Wilderness

Field Editorial Guide

About Reserva Biológica União

Reserva Biológica União is a protected biological reserve in Rio de Janeiro, Brazil, known for its exceptional Atlantic Forest biodiversity and strict conservation measures that limit public access.

Wilderness Landscape & Natural Heritage

Reserva Biológica União, located in the state of Rio de Janeiro, Brazil, covers a significant portion of the Atlantic Forest biome, one of the most biodiverse and endangered forest ecosystems in the world. Established in 1998 through the merger of two previously existing conservation units, it represents one of the largest protected forest areas in the region. The reserve encompasses dense tropical rainforest, mountainous terrain, and several freshwater sources, providing critical habitat for numerous endemic and threatened species. Due to its classification as a biological reserve, public access is highly restricted, focusing primarily on scientific research and environmental monitoring. This limits recreational usage but enhances the effectiveness of habitat protection efforts. The area plays a key role in preserving rare species such as the golden lion tamarin and the red-billed curassow, along with a variety of orchids, butterflies, and amphibians. Its terrain offers steep slopes and valleys that contribute to the isolation and conservation of these habitats. While recreational activities like hiking and camping are generally prohibited, localized low-impact environmental education programs may be allowed under strict supervision. The reserve is an important reference for ecological studies and environmental preservation in the Atlantic Forest region. Visitors interested in the reserve usually engage with nearby ecological parks or visit surrounding communities to learn about local conservation efforts and enjoy the regional biodiversity through guided tours outside the reserve boundaries.

Field Guide · Biological Reserve

Notable Landscape Features

Iconic geological landmarks, alpine vantage points, and distinctive ecosystems in Reserva Biológica União.

Feature 1

Atlantic Forest Habitat

One of the most endangered and diverse tropical forest ecosystems worldwide, featuring high species endemism.

Feature 2

Golden Lion Tamarin Habitat

Critical forest habitat for the golden lion tamarin, a rare and endangered primate species native to the region.

Feature 3

Freshwater Streams

Numerous clear water streams run through the reserve, supporting varied aquatic ecosystems and providing water to surrounding areas.

Key Wilderness Highlights

Significant remnant of Atlantic Forest ecosystem with exceptional biodiversityHabitat for endangered species such as the golden lion tamarinImportant refuge for threatened bird species like the red-billed curassowFreshwater streams supporting aquatic species and pristine watershed
The Ranger Station

Visitor Logistics & Essential Planning

Everything you need to know about entrance passes, seasons, visitor centers, road transit, and wildlife safety in Reserva Biológica União.

Passes & Fees

Entrance Requirements & Interagency Passes

Strictly controlled; entry permitted only for authorized scientific researchers and monitoring personnel.

Wilderness Checklist

Carry paper topographic map & compass in remote zones.
Store all food and scented items in approved bear canisters.
Check wildfire / smoke advisories before backcountry departure.
Pack out everything you pack in (Leave No Trace).
Adventure Basecamps

Gateway Towns Near Reserva Biológica União

Stay, dine, and gear up in these mountain towns and scenic desert basecamps surrounding the park.

Rio de Janeiro, State of Rio de Janeiro, RJ
Gateway Basecamp

Rio de Janeiro, State of Rio de Janeiro, RJ

Rio de Janeiro mixes urban excitement with adventurous outdoor spots. From hiking iconic mountains to surfing famous beaches, it's perfect for thrill-seekers and sun lovers alike.

Year-roundExplore Town
Mangaratiba, Rio de Janeiro, RJ
Gateway Basecamp

Mangaratiba, Rio de Janeiro, RJ

Mangaratiba is a tranquil coastal town in Rio de Janeiro offering hiking in lush Atlantic Forest, kayaking through calm bays, and access to pristine beaches. Ideal for travelers seeking outdoor adventures away from busy city centers.

April to OctoberExplore Town
Paraty, Rio de Janeiro, RJ
Gateway Basecamp

Paraty, Rio de Janeiro, RJ

Paraty, RJ is a historic coastal town surrounded by lush Atlantic Forest and pristine beaches. It’s perfect for hiking to waterfalls, paddling calm bays, and exploring colonial charm on foot or by bike.

April to November (dry season)Explore Town