The Cetina carves through thirty kilometers of karst canyon between the Dinaric highlands and the Adriatic coast, dropping through a fractured limestone corridor that has sheltered bandits, millers, and partisan fighters across eight centuries. The river's gradient is gentle enough for first-time paddlers — Class II rapids dominate the middle stretch, with three brief Class III drops where the canyon narrows — yet steep enough to sustain a constant downstream pull that requires no portage. Cetina river rafting from split became commercially viable in the early 1990s, when demobilized raft guides from the Tara and Soča rivers relocated to Dalmatia and mapped the nine-kilometer navigable section between Penšići weir and the Radmanove Mlinice ruins. The canyon's appeal lies not in technical difficulty but in its layered geography. Vertical walls rise forty to ninety meters on either side, their strata tilted and folded by the Adriatic microplate's northward drift. Holm oak and Aleppo pine anchor the upper ledges; maidenhair fern and moss colonize the spray zone near the waterline. Between rapids, the current slows across jade-green pools ten to fifteen meters deep, fed by subterranean springs that hold the water temperature at 8–12°C year-round. Four documented caves punctuate the left bank, accessible only by water; the largest, known locally as Velika Pećina, extends forty meters into the cliff and surfaces in a daylit chamber hung with tufa curtains. Commercial operators in Omiš launch five to twelve cetina river rafting from split tours daily between April and October, each carrying six to ten guests in self-bailing rafts crewed by a single guide. The standard route runs nine kilometers and includes two to four optional cliff jumps from platforms three, five, and seven meters above the water. No prior experience is required; children as young as eight are permitted when water levels are low. The season peaks in June, when snowmelt from the Dinara range raises the flow rate to 40 cubic meters per second and sharpens the rapids' hydraulics. By September the river drops to 15 cubic meters per second, and the current softens into long glides interrupted by brief standing waves. Split lies twenty-eight kilometers northwest of the put-in point at Penšići. Most tour packages include minibus transfers, neoprene wetsuits, helmets, and waterproof barrels for personal items. The drive follows the coastal highway through Stobreč and Duće, then climbs inland along the Cetina's lower valley, passing the fortress ruins at Omiš where the river meets the sea. Round-trip logistics consume ninety minutes; the rafting itself lasts two to three hours, depending on water level and the number of swim stops.