It is the only Biosphere Reserve located in the highly populated Metropolitan Area of Buenos Aires.
The reserve contains the 'Árbol de Cristal' (Crystal Tree), a historic specimen that has become a symbolic landmark of the park.
The area was originally a vast private estate belonging to the Iraola family, one of the most prominent landowners in 19th-century Argentina.
It preserves a rare remnant of the 'Talar' forest, which is an ecosystem of high conservation value in the Pampa region.
The park serves as a natural habitat for over 200 species of birds, making it a primary destination for regional birdwatching.
It contains historical ruins of irrigation canals and buildings dating back to the estate's early development.
The Pereyra Iraola Biosphere Reserve is a 10,246-hectare protected area designated as a UNESCO Biosphere Reserve, located between the urban centers of Buenos Aires and La Plata. It serves as the primary green lung for the metropolitan region, preserving a unique intersection of Pampa and Espinal ecoregions. The park features an extensive collection of exotic tree species introduced in the 19th century by the Iraola family, alongside native forests of coronillo and tala. It hosts significant archaeological sites related to the original estancia and serves as a vital biological corridor for local fauna. The reserve is divided into restricted zones for conservation and public access areas for recreation. Its landscape is characterized by rolling plains, artificial lakes, and expansive grasslands that support diverse bird populations.
The scenic trails surrounding the historic lake area, particularly during the golden hour.
Bring insect repellent as the wooded areas and tall grasses are home to mosquitoes and ticks.
Stay on marked trails to avoid getting lost in the expansive and dense vegetation.
Carry sufficient water and food as amenities inside the park are very limited.
Do not attempt to traverse the reserve after sunset, as the lack of lighting and dense forest paths pose significant safety risks.
Open daily, though certain internal areas may be restricted or closed during extreme weather events or periods of high fire risk.
Stay on designated paths, do not disturb wildlife, remove all trash, and do not light fires outside of specified recreational zones.
