The Tyrolean Lech is unmistakable! It is the Last wild river in the northern Alpine region and, as the "last wild one", shows largely natural dynamics in its wide riverbed with mighty gravel and gravel banks. Branches of the river branch out and unite. Stones from the side valleys are constantly being relocated and transported by the Lech water. This bedload transport is a defining characteristic of a wild river landscape.

The truly permanent feature of the "wild river" habitat is its constant change. Low temperatures, little plankton and a high content of minerals, together with sunlight, result in the striking light blue-turquoise colour of the water, a trademark of the Tyrolean Lech. Rainfall and heavy thunderstorms can change this beautiful colour within a few hours. Muddy, brown, the Lech then rolls through the valley!
During floods, the Lech is wild and impetuous. And in summer it can carry up to a hundred times more water than in winter when the water level is low.