This journey from Constância to Serra da Estrela is not only a challenge at all levels but also a remarkable experience. During the entire tour you will be accompanied by the Zêzere river, since the point where it flows into Tagus river, from the place where, it is born in Serra da Estrela, next to Vale Glaciar. Along the journey you will find some of Portugal’s most beautiful river beaches, and you will be difficulty in finding any traffic as it is almost non-existent. Everything is delightful, from the overwhelming landscapes to the delicious snacks that will await you. You’ll find out that you can go anywhere on your bike and this is a real revelation and an incredible feeling. As we approach the mountainous Serra da Estrela, the desire to reach the top increases.