Barcelona from above - the Carretera de les Aigües balcony over the city and the Montjuïc gardens and castle

The line through Barcelona, Catalonia, Spain - waypoints, elevation and the day-by-day shape of the walk.
Year-round
Mediterranean sun and heat
Open year-round; hot in summer. Confirm.
A level dirt "balcony" path across the Collserola hills plus the Montjuïc park hill
Non-technical walking/hiking; confirm any exposed or scrambly sections locally
Marked/waymarked route; navigation generally straightforward - carry a map and confirm locally
Accessible to most walkers and families; not fully wheelchair accessible - confirm
Confirm typical crowd levels
Either section alone; the Tibidabo add-on
Collserola / Montjuïc, Barcelona (transit-accessible)
Funicular and metro connect the ends
Day route - none needed
Day-hike kit, water, sun/rain protection, sturdy footwear; coverage varies
Services in Barcelona; limited or none on the trail
Not required; self-guided
No permit; metro/funicular links
Permits and operators change - confirm before booking.
Sun/heat; otherwise easy
Retrace the route to exit; dial local emergency services; carry a means of calling for help where remote
This profile is desk research, compiled from public sources - not a first-hand trail report. Coordinates are approximate.