Those choosing Costa Marques as a travel destination can plan around two scales: Forte Príncipe da Beira in the immediate area and the seasonal themes of the Rio Guaporé in the wider region. The Praia do Curralinho and its annual festival are also part of the picture. These themes relate to different geographical and time contexts, so choosing a clear focus can make it easier to select the right time to travel.
Forte Príncipe da Beira and its history
Forte Príncipe da Beira is located on the banks of the Rio Guaporé, in the area near Costa Marques. It is in the municipality of Costa Marques, on the border with Bolivia, and has been a national historic heritage site since 1937. With a perimeter of more than 900 meters, it is one of the largest examples of Portuguese military engineering in colonial Brazil. The government of the state of Rondônia describes it as the most significant structure of the Portuguese Empire outside Portugal. The measurement gives a sense of its scale; its status as a national heritage site and its recognition by the state offer two distinct perspectives on its history.
For travel between the urban center of Costa Marques and the fort, RO-478 is an important point of reference: a 2025 report describes it as the main access road between the two. If you are planning this drive, check the current road conditions in advance.
The Beach Festival and river landscape
Praia do Curralinho, in the area near Costa Marques, is the venue for the annual Festival de Praia, which brings together residents of Costa Marques and tourists. If you are planning your trip around the festival, check the dates for that year's edition. The 2016 17th edition of the Festival de Praia was scheduled to include men's and women's beach volleyball competitions as well as footvolley. These events were part of that edition; for a later trip, the program for that year's festival is what matters.
The river landscape also offers a seasonal reason to choose your travel dates carefully. In the wider region, the Rio Guaporé in the Vale do Guaporé is a destination for sport fishing. During the dry season, the river's bays and backwaters are home to many tucunaré. As the water level of the Rio Guaporé falls, several beaches emerge in the region. These are distinct seasonal indicators: the beaches depend on falling water levels, while the abundance of fish is associated with the dry season. If sport fishing is your main focus, you can take this seasonal connection into account when planning your trip.
When looking for a vacation rental in Costa Marques, you can consider your preferred focus and travel dates together. For the festival, the dates of that year's edition are relevant; for beaches and sport fishing, water levels and the dry season provide different indications.
Discover more destinations: Cabixi, Ariquemes, Abraão, Vilhena, Rolim De Moura, Ji-Paraná, Porto Velho, Cacoal
For the broader travel overview: Rondônia.
