Access is free, but a timed ticket is mandatory in high season: weekends in spring/autumn and daily mid-June to mid-September, 10am–7pm (5pm in winter). Reserve on the official site, July/August slots go 2–3 weeks ahead. On a tour, it's handled for you.
Ways to make the trip
| Option | What you get | Upgrades | Pick it if | Price from |
|---|---|---|---|---|
| 🍷 Gaztelugatxe, Biscay Bridge & Txakoli | Guided visit to the Biscay Bridge & Gaztelugatxe viewpoint, Visit to an estate with Txakoli tastings, Round-trip transfers to/from Guggenheim Puppy sculpture, Expert guides | Small-group tour of 8, Bermeo guided walking tour, Lunch and leisure time in Mundaka, Round-trip hotel transfers | You want a day that blends Gaztelugatxe, local vineyards, and one of Spain's most remarkable engineering feats. | €75 |
| 🚐 Gaztelugatxe, Mundaka & Guernica | Guided visit to Gaztelugatxe, Mundaka & Guernica, Free time for lunch at Mundaka (at your own expense), Round-trip transfers to/from the Guggenheim Puppy sculpture, Expert guides | Small-group or private tour, Round-trip hotel transfers to/from Bilbao | You'd trade a txakoli tasting and the Biscay Bridge for the surf town of Mundaka and the historic town of Guernica. | €69 |
How the day runs
Morning pickup in Bilbao
The road to the sea
The islet viewpoint
The 241-step climb
Coast towns & a glass
Back to Bilbao
What the route delivers
From Bilbao, or somewhere else?
| Departure point | The haul | Best for |
|---|---|---|
🏙️ Bilbao (guided tour) | 45 mins each way · 5–7 hour full-day trip | The easiest option: your ticket is handled, and nearby stops come built in. The trade is that 1.5 hours of your day is spent on the road. |
🚌 Bilbao by public bus (DIY) | 1.5 hours each way · Bizkaibus A3518 | The cheapest run at a few euros, but you must book the free Gaztelugatxe ticket yourself and connections are sparse, so timing is on you |
🏖️ San Sebastián | 1-hour 45 mins each way | A longer day, usually paired with a Bilbao and Guggenheim stop, the better pick if you're already based in San Sebastián |
🥾 Stay in Bakio or Bermeo | 15-min drive/a 2-km coastal walk from Bakio | Hikers and early birds who want the islet at dawn, before the crowds and the ticket window even open |
















