Brown trout (Salmo trutta fario) is a trout which can be found in most of the Slovenian rivers running to the east and belong to the Black Sea Basin. In the recent decades they have become pretty rare, due to: mismanagement by stocking rivers with the Atlantic lineage of brown trout; the trend of rising river water temperatures; and stocking rivers with large numbers of rainbow trout.

Despite all of that, there are still places where brown trout can be found in large numbers and all kind of sizes; from tiny little beauties that reside high up in mountain creeks with minimal nutrition, to the big old mommas that can be found at tail outs of big pools in the middle stretches of rivers at dusk. The best rivers to fish for them are the Sava Bohinjka, Sava Dolinka, Radovna, Tržiška Bistrica and Krka.