Barcelona is delimited between the Mediterranean Sea and Collserola Park. The Park are the city´s lungs, and a close place for its citizens to enjoy the mountain. In the park there is an unpaved flat road that, at certain elevation, overlooking the city. It´s “Passeig de les Aigües”, a popular place for walking, running, and biking. During Covid 19, with restrictions to exit the city during the weekend, it is more crowded than usual, but still a good place for a relaxed ride. The route starts close to Sant Pere Martir, goes down to the south end of Passeig de le Aigües, and then rides north on this flat track for several Km, overlooking the city. There is a final climb, to finish the route at Vallvidrera.