san sebastian to Pasaia walk
 

How difficult is the walk and how long does it take? If we want to take the bus there and walk back, where do we get the bus?

If you Google using your title words I think you'll find answers to all your questions, lots of information including where to get the bus. Looks like a great walk & not very long.

I spent several hours on that walk, but I stopped to take many, many pictures. And I had been assured that it was very easy, but I was walking with a thigh injury. and found it a bit more challenging than I had hoped. Worth every step, though!