Stage 4: Bellinzona – Zermatt
Riederalp, Aletschgletscher_
Introdução
The stage with the most bends – the Tremola snakes its way from Airolo up to the Gotthard Pass. At its most spectacular point, over a length of four kilometres the road climbs a height of 300 metres in 24 hairpin bends, each with its own name.