Staying in Bovec, take the bus to Trenta information centre and grab a map from there. The staff will show you where the route starts. Really easy to follow trail the whole way back to Bovec. Stop for a beer just past the Kamp Soca campsite at Pension Kamp Klin. Great place for a swim here too if you bring your gear... or not! This is the most beautiful hike I've ever done, from start to finish. Well worth the 6 hour investment!