Pamplona's own river, the Arga, runs directly through the city. Further into the Pyrenean foothills, the Irati — widely called the finest trout river in the Navarrese Pyrenees — rises from the Irabia lakes and runs 74km through beech forest.
This is genuinely beautiful wild-trout water, with its own coto permit system worth understanding before you plan a trip.
The Arga for the easy city-river start. The Irati, planned well ahead, for some of the finest wild trout fishing the Navarrese Pyrenees have to offer.
Fly Fishing from Pamplona: A City River, and the Pyrenees' Best Trout Water
Pamplona's own river, the Arga, runs directly through the city, giving a Navarrese angler the same in-town convenience Perth or Galway can claim. But the real destination, worth the drive into the Pyrenean foothills, is the Irati — a river regularly named the best trout water in the whole Navarrese Pyrenees, rising from the Irabia lakes in the Roncal valley and running 74 kilometres through beech and fir forest before joining the Aragón.
This is genuinely beautiful wild-trout water, in scenery that draws hikers as much as anglers, and it comes with its own permit system worth understanding before you plan a trip.
The Legal Bit, Briefly
A Navarra fishing licence is required throughout, plus a separate daily coto permit for the Irati's prized stretches — some allocated by sorteo, others sold directly day by day.
Navarra requires a valid Licencia de Pesca for the current season, issued by the Gobierno de Navarra, as the baseline for all freshwater fishing. For the Irati's best water, classified within the Región Salmonícola Superior, you also need a personal, non-transferable daily permit for a specific coto and basin — some of these are allocated by public sorteo, others sold directly on a given day, depending on the specific stretch.
One rule worth flagging specifically: the mixed zone covering the Irati, the Itoiz reservoir and Nagore runs catch-and-release only from 1 August to 30 September. Confirm the current rules for whichever stretch and dates you're planning around directly with the Gobierno de Navarra before travelling.
The Arga: Start in the City
Pamplona's own river, running directly through the city, with the Ulzama and Erro extending the same character further into the foothills.
The Arga is the convenient starting point — a genuine city river rather than a drive-to destination, with the Ulzama and Erro extending similar water further out into the Navarrese countryside as the foothills rise towards the Pyrenees proper. None of these carry quite the reputation the Irati does, but they are a reasonable way to spend an afternoon without committing to the longer drive north.
The Irati: The Best Trout River in the Navarrese Pyrenees
Rising at the Irabia lakes in the Roncal valley, running through beech forest for 74km — among the most in-demand coto permits in Navarra, and worth planning well ahead for.
The Irati earns its reputation on the strength of both the fishing and the setting: wild brown trout in a river running through some of the most striking beech forest in the Pyrenees, in the Aézkoa valley and beyond. Its cotos are consistently among the most requested in Navarra, which means planning ahead — checking application windows for the sorteo-allocated stretches, or timing a visit around the stretches sold directly day by day — matters more here than on rivers with less demand pressure.
The Pamplona Year
Spring and early summer for the core trout season across the Arga and Irati. Intensive-stocked cotos run February through November. August–September on the Irati mixed zone is catch-and-release only.
The core wild-trout season on the Irati and its neighbours runs through spring and early summer, with exact dates set annually by the Gobierno de Navarra — confirm before travelling. Intensively-stocked trout cotos elsewhere in the region run from 1 February to 30 November, a much longer season for anglers wanting a more reliable, lower-stakes day.
Remember the Irati mixed zone's catch-and-release-only rule from 1 August to 30 September if planning a late-summer visit specifically for that stretch.
What to Carry
A 7'6" to 8'6" 3–4 weight for the Irati's technical forest-river wading. A 9' 5-weight covers the Arga and wider foothills water.
For the Irati: a short 7'6" to 8'6" rod of 3 to 4 weight suits the tight, technical wading a forested Pyrenean river demands — small, sparse nymph and dry patterns matched to the local hatch outperform anything flashy.
For the Arga and the wider foothills cluster (Ulzama, Erro, Urrobi): a 9' rod of 5 weight with a floating line is the versatile choice.
Carry your Navarra fishing licence plus the specific coto permit for whichever stretch you fish, and check the current catch-and-release rules for the Irati mixed zone if fishing in late summer.
The Final Verdict
The Arga for the easy city-river start. The Irati, planned well ahead through the coto system, for some of the finest wild trout fishing and scenery the Navarrese Pyrenees have to offer.
Pamplona's case runs from convenient to genuinely special: the Arga for an easy afternoon in the city itself, and the Irati — plan for it, apply for it, and make the drive into the beech forest for it — as one of the best wild-trout experiences this whole set of guides covers.