Climb the 241 steps to San Juan de Gaztelugatxe, watch surfers carve the world-class left at Mundaka, and tour the moving historical sites of Gernika on a private day trip from San Sebastián. This full-day route blends coastal hikes, estuary overlooks and Basque history into one accessible adventure.
More ways to explore the area's outdoor wonders
You step out of the van before most of the day’s light has warmed the Atlantic. The path to San Juan de Gaztelugatxe threads along a wind-scrubbed headland; the sea below is a restless, gray muscle that dares you closer. A narrow stone bridge connects the mainland to the islet, and the hermitage perches above the chop like a quiet challenge. There are 241 steps to the chapel — each one a small, steady contract between you and the coast — and when you reach the top the cliff air seems to push the horizon into sharper focus.
Difficulty
moderate
Duration
7–8 hours
Fitness Level
Moderate—comfortable walking on uneven and stair terrain, stairs require good knee and ankle stability.
Wildlife
History
Gaztelugatxe’s hermitage site has medieval origins; Gernika remains central to Basque political identity after the 1937 bombing and subsequent cultural memory.
Conservation
Urdaibai is a UNESCO Biosphere Reserve—stay on marked trails to protect wetlands and nesting grounds; local guides follow sustainable practices to limit impact.
Reserve your spot on the Private Tour: Gaztelugatxe, Mundaka & Gernika from San Sebastian today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Wear grippy shoes for the stairs
The 241-step ascent is steep and can be slippery when wet—trail runners or hiking shoes with good tread are recommended.
Bring a refillable water bottle
There are no guaranteed water stops on the route; carry at least 1–1.5 liters per person for the day.
Plan lunch in Mundaka
Lunch isn’t included—Mundaka has excellent seafood and pintxos options near the port; allow 45–60 minutes.
Check local weather alerts
Coastal winds and red/orange alerts may restrict access to Gaztelugatxe—follow guide and Euskalmet advisories.
Sturdy hiking shoes
Provide traction on rocky approaches and the 241 stone steps to the hermitage.
Windproof layer
Coastal winds are strong year-round; a lightweight shell cuts chill and spray.
Refillable water bottle or hydration bladder
Keeps you hydrated through the hike and while walking Mundaka and Gernika.
Compact camera or phone with spare battery
For coastal panoramas, surf action in Mundaka, and emotive shots in Gernika.