Fishing in Jamanxim National Park

Jamanxim National Park sits in the southwestern corner of Pará state, covering roughly 860,000 hectares of dense Amazonian rainforest laced with river systems and floodplains.

The park lies near the municipality of Novo Progresso and forms part of a larger corridor of protected areas in this stretch of the Amazon basin.

The water here is the water of the lowland Amazon: rivers moving through thick forest, riparian zones shading the banks, and the kind of access that demands planning.

The Rio Jamanxim is the park's defining waterway, threading through the protected area and giving the park its name.

Fishing on the Jamanxim happens within demarcated zones inside the park — not the river in its entirety — so knowing exactly where you're permitted to fish matters before you launch.

Fishing zones are marked within the PARNA (Parque Nacional), and anglers should confirm current boundaries directly with ICMBio, the federal agency that administers Brazil's national parks and issues the relevant authorizations.

Building a Jamanxim trip into a longer Alto Tapajós itinerary of five to seven days reflects the reality of access: this is remote southern Pará, and the logistics reward anglers who treat it as a multi-day expedition rather than a day trip.

Other waters within the park — the Rio Branco, Rio Carapuça, Rio Aruri Grande, Igarapé Gui, and Igarapé Machado — run through the same forested terrain.

Igarapés (small forest streams) in this part of the Amazon tend to fish differently from the main river channels, offering tighter, shadier water. Fishing in a Brazilian national park means operating under ICMBio oversight.

Confirm with ICMBio what permits are required on top of any standard Brazilian fishing license, and check current rules before the trip — regulations in protected areas can change, and what applied on someone else's last visit may not apply on yours.

The park is under real pressure. A 2025 Supreme Court ruling cleared the way for the Ferrogrão railway to pass through, and deforestation in the surrounding region is ongoing.

Fishing here is fishing inside a conservation unit that is actively contested — worth keeping in mind when you're on the water.