The start point is the town Špindlerův Mlýn, located about 150 km NNE from Prague. In Špindlerův Mlýn park your car in Medvědín parking, free. After you leave your car, continue along the road towards Špindlerova Bouda.
Do not cross the river Labe. There is a nicer way for skiers behind the river, but you need to get the written permission.