If you prefer booking in advance, here are the details of our reservation... Teletaxi San Fermin - (
https://taxipamplona.com/en/) or +34 948-23-23-00. I'm not sure how many the taxi we reserved can accommodate but the more the merrier (and cheaper). It cost about €100 so I'm thinking it might hold as many as six to eight. The reservation is under the name of "Naomi", there is a comment section on the online booking page and you can probably request that same car. If you are winging it, if you want to share phone numbers we can communicate that afternoon. Bottom line... we welcome the chance to divide the cost by as many as possible.