Location: northwest Bosnia and Herzegovina
Spring: Gornja Sanica
Characteristics: mountain river, 10 m wide, 1-2 m deep

The River Sanica is the left tributary to the river Sana, 12 km from Kljuc, 10-25m wide and 0.5-4m deep. It is very accessible for fly fishing and is rich in grayling, which make up 70% of the total fish population. Besides grayling, you can also find brown trout. It is possible to catch fish using both dry flies and nymphs, but the fish are especially active all day long when using a dry fly.

Most grayling are longer than 45 cm and occasionally exceed 60 cm.