River Kupa flows from the Risnjak National Park, flowing between forest-covered mountain slopes and rich valleys, but offering sufficient water for rafting only in spring and after heavy rainfalls.
River Dobra has a surface course and an underground course and offers first class rafting conditions at all times because dams and accumulation lakes permit a sufficient flow through of water.
River Mreznica abounds with waterfalls, but between them the water flows calm. Rafting through the upper, canyon course involves elements of canyoning.
River Korana issues from the Plitvice lakes. After heavy rains and when snow melts the section below the picturesque site of Rastoke, and downstream through the canyon, is particularly attractive.
River Una, which forms the border between Croatia and Bosnia, provides excellent rafting conditions downstream of the 20 metre-high Strbacki buk waterfall, when the waters are running high, although the experience is somewhat less exciting when water levels fall.
River Zrmanja abounds with water in springtime, while in summer smaller craft - canoes and kayaks - must be used to travel this, the most beautiful of Croatian canyons.
River Krka can be negotiated through the upper part of the national park due to the inflow from its tributary, the River Butisnica, which is controlled by a dam. Rafting is the only way to really get to know this undisturbed area of the park, and the only place where a detour by land is necessary is the 12 metre-high Bilusica buk waterfall.
River Cetina waters are directed via a tunnel towards a power plant on the coast, which means that there is not much water for rafting in its natural canyon bed. The experience is still worth undertaking if only because of thick and lush vegetation along its banks, the clear waters, high cliffs, waterfalls and caves.