On the supply routes to the front of the mountain war, some of the best bike tours in the Alps can be found. From 1915 to 1918, Italian and Austrian troops faced each other in bloody trench battles in the Dolomites. Today, the traces of these battles have largely been erased. Only the supply routes on both sides of the front still exist. For mountain bikers, these paths offer an almost inexhaustible field of activity. This book describes some of the most spectacular tours in the Alps. At the same time, it is a quest for traces and tells the story of a war without precedent. The 34 best tours from Sexten across the Dolomites to Monte Grappa, complete with GPS data for download and road maps at a scale of 1:50,000.