The Vrbas River above Banja Luka runs through a dramatic limestone canyon with rapids that have made this stretch a respected whitewater destination. Several rafting operators based in the city offer guided trips on the canyon, ranging from half-day excursions to full-day adventures with picnic stops.
The water is cold even in summer — fed by springs from the Dinaric plateau — and the canyon walls are steep enough to keep the gorge in shadow for much of the day. The rafting season runs from April to October, with the best water levels in spring when snowmelt adds to the flow. For visitors who want something more adventurous than sightseeing, this is the best option within easy reach of the city centre.