Spain's fly fishing is centered on the Pyrenees, threaded with hundreds of rivers, streams, and high-altitude lakes holding well-conditioned wild trout. The Ara, Gallego, and Noguera Pallaresa are among the most notable systems, each with distinct character from broad wading rivers to intimate limestone streams. Spanish fishing regulations and seasonal closures protect many of the best reaches, and access to premium water is arranged through licensed guides.

The season runs from spring through early autumn, with May and June offering excellent dry fly fishing as insect hatches intensify. August brings terrestrial action — ants, beetles, and grasshoppers produce explosive rises in meadow sections of the larger rivers. High-altitude lakes accessible on foot or by four-wheel drive add a wilderness hiking dimension for anglers who enjoy combining adventure with angling.