[1][2] The length of Doljanka is around 18 km, and it descends about 400 meters in elevation.

It rises from sources scattered under the far northeast slopes of Vran mountain at 1324 meters elevation.

It runs through limestone canyon, which is up to 1,200 meters deep, and flows through the village of Doljani.

The water level of the river is slightly lower compared to other Neretva tributaries, because its riverbed is rocky and sandy, which allows brown trout and its natural food.

The difference in water level in summer compared to winter is quite large.