Soca river between Bovec and Trnovo, in Slovenia, near the Italian border (where the name changes in Isonzo), is one of the best and most challenging downriver racing venues in the world.
This wonderful, incontaminated area, not far from Triglav National Park, is a very popular kayak tourism destination (Soca river is normally full of plastic playboats), and the river is open to paddlers from mid-April to mid-October.
This video shows a resume of the 1991 world championships for canadians C1 (world title won by the Yugoslav Crnkovic) and C2 (the French Archambault and Carlin became world Champions). Really a great show!