This is a beautiful walk of about 6km within the city that takes about 2 hours, winding through the districts of Gràcia, Carmel and Horta-Guinardó. Along the way we pass three hills: Coll (249 meters), Carmel (267 meters) and Rovira (261 meters).
This hike begins just off Plaça de Karl Marx, in the Barcelona district of Canyelles. The Canyelles (L3) metro stop is a short within a short walk. The trail into Collserola is the old path of Saint Lazarus.