If you can ride a bike, you can do this tour. It is suitable for all ages and is not the least bit strenuous. You will ride at a nice, relaxed pace, on flat dirt route, and witness the most beautiful views Barcelona has to offer.
The Collserola Natural Park is an oasis in the Barcelona metropolitan area providing the population with a green wooded area away from the crowds and pollution associated with most big cities around the world. It contains around 10 million trees, 1,000 species of plants and almost 190 species of animals, reptiles and birds.