The islet of Gaztelugatxe has no ticket office, no entry fee and, most days of the year, no booking system either. What it does have is a car park that fills between 10am and 4pm, and a provincial council that openly tells drivers to leave the car behind.
Do you need a ticket for Gaztelugatxe? Entry to San Juan de Gaztelugatxe is free all year, and a ticket, also free, is required only on the controlled-access days set by the provincial council of Bizkaia, which caps numbers at 1,462 a day. The path runs 1,200 metres at a 35% gradient, plus 241 steps.
San Juan de Gaztelugatxe is a natural monument on the Bizkaia coast, an islet joined to the mainland by a stone causeway between the towns of Bakio and Bermeo.
Buses to Bermeo and Bakio, with summer frequencies
Two Bizkaibus lines run from Bilbao to the towns either side of the monument. The A3527 goes to Bermeo by motorway; the A3518 goes to Bakio, leaving from Moyua and crossing fare zones 1, 3 and 4.
The summer timetable published by Bizkaibus for the Bermeo line splits into two periods, and the second one carries a trap worth reading twice.
| Period and direction | Weekdays | Saturdays | Public holidays |
|---|---|---|---|
| 6 to 30 June, Bilbao to Bermeo | 6.45am to 9.45pm, every 30 min | Every 60 min | 9.15am to 9.15pm, every 120 min |
| 1 July to 31 August, Bilbao to Bermeo | 6.45am to 9.45pm, every 30 min | Every 60 min | No service |
| Bermeo to Bilbao, both periods | 6.20am to 8.50pm, every 30 min | Every 60 min | No service in July and August |
The Bakio line is the more generous of the two. In the same summer window the A3518 runs every 30 minutes from 6.30am to 10pm on weekdays, from 7.30am on Saturdays and from 8am on public holidays, returning from Bakio until 9.40pm.
One local link disappears in high season. The A3524 between Bermeo and Bakio suspends its service from 6 June to 31 August, and the A3517 covers the route instead, connecting Bilbao with Bakio hourly from 6.40am to 10.40pm and continuing to Bermeo until 7.40pm.
A journey into zone 4, where Bakio sits, costs €1.90 with a Barik card, as published by Bizkaibus. How that card works, and whether it beats the alternatives for a visitor, is set out in the guide to the Barik card.
The ticket rule, in plain terms
Entry to Gaztelugatxe is free on every day of the year. What varies is paperwork. On controlled-access days, a free ticket booked online must be shown, printed or on a phone, to the staff at the access point. On every other day, access is open with nothing to show.
The calendar deciding which days are which is published annually by the provincial council of Bizkaia, so it has to be checked against your own dates rather than assumed. The cap those days enforce is 1,462 visitors.
Five dates each year are set aside for local socio-cultural celebrations: 24 June, 31 July, 29 and 31 August, and 30 December. Tourists are advised not to visit on those days.
Anyone who books and then changes plans is asked to cancel, freeing the slot. Queries go to +34 688 73 81 47 or gaztelugatxe@bizkaia.eus.
Why the council wants your car parked elsewhere
The most useful piece of advice about Gaztelugatxe comes from the body that manages it. Both car parks, the main one at the Urizarreta entrance and the second at the Lurgorri recreation area near the Ermu access, are usually full between 10am and 4pm, according to the Bizkaia provincial council.
The council’s own recommendation is to leave the car in Bakio or Bermeo and continue by bus or on foot. That reverses the usual logic of a rural monument: here the bus is the recommended option and the car is the fallback.
Walking in is a real alternative rather than a consolation. From the Bakio viewpoint, the Bakio-Matxitxako coastal path runs parallel to the sea and reaches the Urizarreta access after two kilometres. By car from Bilbao the drive is about 45 minutes.
What the walk actually involves
The visit is a loop of 2,800 metres plus the climb, and its two halves are not symmetrical:
- 1,200 metres at 35% on the way in from Urizarreta, the steep half
- 1,600 metres at 15% on the way out to Ermu, longer and gentler
- 241 steps from the causeway to the hermitage door, on top of both
The council is blunt about who should not attempt it, and the 35% stretch is why. The route demands significant physical effort and is not advisable with health problems, walking difficulties or pushchairs, nor with certain physical disabilities.
The official alternative is the viewpoint on the Ermu route, with the islet in view and no 1,200-metre descent. On site there are an audio guide, toilets, a first-aid point and a picnic area, all of them free like the €0 entry itself.
Weather is part of the plan, not a detail
The site is an exposed rock over open Atlantic water. Visitors are told to check the Euskalmet forecast before travelling and to follow official recommendations in extreme conditions.
On orange alert days the advice is explicit: do not climb to the hermitage during the affected hours. A booking dropped for that reason can be cancelled online and moved to another date, freeing one of the 1,462 daily places.
The rest is ordinary precaution for a coastal climb: proper footwear, water and sun protection across the 1,200-metre approach and the 241 steps, which in July and August are done in full sun.
How to build the day
- Leaving Bilbao without a car → A3518 from Moyua to Bakio, every 30 minutes in summer
- Travelling on a July or August public holiday → the Bermeo line does not run, go via Bakio
- Driving anyway → park in Bakio or Bermeo, as the council recommends
- Wanting a swim as well → Bakio has a beach and sits on the same bus line
- Travelling with a pushchair or limited mobility → the Ermu viewpoint, no descent
- Arriving 24 June, 31 July, 29 or 31 August → local celebration days, pick another date
Which town to arrive through
Bakio and Bermeo give different days out. Bakio is the beach side, two kilometres from the access along the coastal path and served every 30 minutes in summer. Bermeo is the fishing port and the only one reachable by rail, at the end of Euskotren line E4, with a bus onwards.
| Gateway town | Bus from Bilbao | Summer frequency | Fare zone | Rail |
|---|---|---|---|---|
| Bakio | A3518 from Moyua | Every 30 minutes, 6.30am to 10pm | Zone 4, €1.90 | n/a |
| Bermeo | A3527 by motorway | Every 30 minutes on weekdays, none on July and August holidays | Zone 4, €1.90 | Euskotren E4 |
| Between the two | A3517 in summer, A3524 the rest of the year | Hourly, 6.40am to 10.40pm | Zone 4 | n/a |
That opens a loop worth planning. Arrive on the A3518 through Bakio, walk the monument, and return on the E4 from Bermeo, without repeating the same road twice. In summer the A3517 links the two towns while the A3524 is suspended.
For a visitor landing in Bilbao the same day, the airport transfer is covered in the guide to Bilbao airport to the city centre, and other coastal days out by public transport in the guide to beaches near Bilbao without a car.
Frequently asked questions about Gaztelugatxe
Do you need to book to visit Gaztelugatxe?
Only on controlled-access days, which the provincial council of Bizkaia lists in a calendar published each year. On those days a free online ticket is required. On every other day access is open with no booking of any kind.
How much does it cost to visit Gaztelugatxe?
Nothing. The access ticket issued on controlled days is free and exists only to cap numbers, which are limited to 1,462 people a day. There is no charge for the path, the steps or the hermitage.
Can you reach Gaztelugatxe by public transport from Bilbao?
Yes, by Bizkaibus to Bakio or Bermeo and onwards to the access point. The A3518 runs from Moyua in Bilbao to Bakio by motorway every 30 minutes on summer weekdays, from 6.30am to 10pm.
How hard is the walk at Gaztelugatxe?
The approach from Urizarreta is 1,200 metres at a 35% gradient, the return by Ermu 1,600 metres at 15%, and 241 steps climb from the causeway to the hermitage. It is not advised with pushchairs or limited mobility.
Is there a viewpoint for people who cannot do the climb?
Yes. The council points visitors who cannot manage the descent and climb to the viewpoint on the Ermu route, which takes in the islet and the causeway without going down to sea level.
The hard part of Gaztelugatxe is not the ticket, which is free, but the bus back and the gradient on the way up.