Yosemite, Zion, Bryce, Arches, Monument Valley, Great Canyon: these are the American Parks where the most beautiful excursions have been carried out during the fortunate travel as well as  announced  on the previous number of our newspaper "the Corriera". The climb to the top of Half Dome, in the park of the Yosemite, and the crossing - in two days - from north to south of the Great Canyon,  were the moments that have demanded the greater physical effort, although the entire one trekking must be considered easy and fit to all the hikers. It is a quite interesting trip through the remarkable diversity in to the wonderful American landscape. Departure and arrival took place from the charming city of San Francisco - California - and the driving by car put us suddenly in the most typical American "on the road" style . We slept in hotel or motel but when possible we spent nights in the camping to the standard of the life to the open air. Considering the interest,  we shall probably plan this trekking again in  the future, or can be organized on your request.