Best attractions and places to see in Pateira De Fermentelos, the largest natural lagoon in the Iberian Peninsula, offers a significant wetland experience. This area is part of the Natura 2000 Network, dedicated to conserving diverse habitats and species. Visitors can explore expansive natural landscapes, rich biodiversity, and numerous opportunities for birdwatching. The region is characterized by its serene atmosphere and ecological importance.
Last updated: May 21, 2026
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30 km circular tour (1.30h) with spectacular landscapes and fauna!!!
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Pateira de Fermentelos is the largest natural lagoon in the Iberian Peninsula, a paradise of biodiversity, home to more than 150 species of birds.
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These red rocks are known as Eirol sandstone, which is a sedimentary rock made up of sand bound together by a reddish cement, clay and iron oxides, and is therefore not very resistant. This sandstone was probably formed in the Upper Triassic period and extends over a small geographical strip delimited by the Vouga and Águeda valleys, and is quite developed in the Espinhel and Eirol area. The trail is indeed very beautiful.
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Espinhel Park offers walkways and viewpoints to enjoy the lagoon and the village of Fermentelos. It is an area rich in biodiversity. and habitat for aquatic and migratory birds, close to the geological formation of Eirol sandstones.
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In the well-equipped Parque de Espinhel, there are walkways over the waters of Pateira de Fermentelos that lead us to two wooden viewpoints, whose structures are reminiscent of a bandstand. From here we can enjoy wide views over Pateira, as well as the village that gives it its name, Fermentelos, on the opposite bank. On the edge of the lagoon, in addition to reeds and bunho, we find dense swampy willows, a refuge and habitat for numerous species of fauna, among which the avifauna stands out. In this place it is common to observe Moorhens (Galinula chloropus) and Coots (Fulica atra). The attentive observer finds an abundant and diversified biological diversity throughout the year, partly due to the occurrence of summer and winter migratory species, such as: Garçote (Ixobrychus minutus), Red Heron (Ardea purpurea), Stilt (Himantopus himantopus), Black (Nycticorax nycticorax), Osprey (Pandion haliaetus), Saffron Eagle (Circus aeruginosus), Black Ibis (Plagadis falcinellus), Spoonbill (Platalea leucorodia), as well as dozens of passerines! In the vicinity of the park, red sandstones from the tertiary period (Eirol sandstones) can be seen in the disused quarry. Source: Great Route of Ria de Aveiro
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During the rainy season, part or all of this section may be submerged or have swampy areas with a lot of mud. It's easy and enjoyable to do in the dry season.
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Pateira de Fermentelos is renowned for being the largest natural lagoon in the Iberian Peninsula. You can explore its expansive waters, rich biodiversity, and significant wetlands. A notable geological feature is the Arenito de Eirol Trail, where you can observe reddish sedimentary rocks from the Upper Triassic period, known as Eirol sandstone.
Pateira de Fermentelos is a crucial area for birdwatching, boasting over 150 species. Espinhel Park offers walkways and two wooden viewpoints that are excellent for observing various bird species, including aquatic and migratory birds. The area around Pateira de Espinchel is also a refuge and habitat for numerous species of fauna, especially avifauna.
Yes, Pateira de Fermentelos offers several family-friendly options. Espinhel Park is well-equipped with walkways and viewpoints suitable for all ages. The Pateira de Requeixo Swing provides a fun and scenic spot with magnificent views. Additionally, Parque de Óis da Ribeira features swings, a lagoon café/bar, and a hammock area, making it ideal for relaxation with family.
The region offers several pedestrian trails. You can find a variety of options, including easy and moderate hikes. For example, there are easy hiking loops starting from Óis da Ribeira or Fermentelos, typically around 5-6 km. For more options, explore the Easy hikes in Pateira De Fermentelos guide or the broader Hiking in Pateira De Fermentelos guide.
The best time to visit is generally during the dry season. During the rainy season, some trails, such as the Seasonal trail – Caution in winter, may be submerged or very muddy. Visiting outside of the rainy season ensures better access to trails and a more comfortable experience exploring the natural beauty.
Yes, the lagoon provides opportunities for various water activities. Visitors can enjoy paddleboarding, boat tours in traditional 'bateiras,' canoeing, and water bike rides. The Parque de Óis da Ribeira also hosts the canoeing center of ARCOR.
Pateira De Fermentelos offers several picturesque viewpoints. Espinhel Park features wooden viewpoints with panoramic views over the lagoon and the village of Fermentelos. The Pateira de Requeixo Swing provides a magnificent view over the Pateira do Requeixo lagoon. Additionally, the Miradouro de Fermentelos (or Miradouro do Outeiro) offers expansive views over the lagoon.
Visitors particularly appreciate the serene atmosphere and natural beauty of Pateira de Fermentelos. The well-equipped parks, extensive walkways over the water, and the rich biodiversity, especially the birdlife, are frequently highlighted. The ease of access to viewpoints and the tranquility of the water are also highly valued.
Yes, the area is suitable for cycling and offers several running routes. You can find various running loops, such as the Espinhel Park loop or the Pateira de Fermentelos loop, with distances ranging from 6 to 12 km. For detailed routes, refer to the Running Trails in Pateira De Fermentelos guide.
Yes, the lagoon is a popular spot for fishing enthusiasts. It is home to various fish species, including largemouth bass, pike, carp, and perch, making it an attractive destination for anglers.
Yes, at Parque de Óis da Ribeira, you'll find a charming lagoon café/bar where you can relax and enjoy the views. The park also features a hammock area, perfect for unwinding amidst nature.
Pateira de Fermentelos is a significant wetland and forms part of the Natura 2000 Network. This designation highlights its importance for conserving rare, threatened, or vulnerable habitats and wild species within the European Union, making it a crucial ecological site.


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