San Juan de Gaztelugatxe - a serpentine causeway and stone steps to a dramatic islet hermitage (a "Game of Thrones" locale)

The line through Basque coast (Bizkaia), Spain - waypoints, elevation and the day-by-day shape of the walk.
Year-round
Atlantic wind and spray; slippery steps
Open year-round; a free timed ticket is needed in season; windy/slippery. Confirm.
A path down to a rock causeway and 200+ steps up a rocky islet
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
Very popular
Viewpoint from above without descending; the full climb to the hermitage
Between Bakio and Bermeo (Basque coast)
Out-and-back/loop - no shuttle needed
Day route - none needed
Day-hike kit, water, sun/rain protection, sturdy footwear; coverage varies
Services in Bermeo; limited or none on the trail
Not required; self-guided
A FREE timed ticket is required in the busy season (book ahead). Confirm.
Permits and operators change - confirm before booking.
Slippery steps, wind, crowds
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.