Fishing is the most popular tourist activity in the region; the local fishing association manages over 145 km of waterways, with navigation allowed only on the Soča. All other rivers - Nadiža, Tolminka, Bača, Kneža, Koritnica, Idrijca and Trebuščica - are reserved exclusively for anglers.

Each river has its own unique and interesting character, enabling anglers to find at least one river for fishing even in less-than-favourable weather.

Among the diverse population of fish, trout are prevalent, with the Soča trout the most well known along with a sub-type called lipan.

Only fly-fishing is allowed.