Hotels are full and/or too expensive. What are the alternatives?
Pamplona hotels sell out during the Running of the Bulls when over one million people crowd into the city of 250,000 inhabitants. The best alternative is to rent an apartment room or a whole apartment in the old part of the city (casco viejo) where the fiesta takes place. Cheaper and more modern apartments can be found outside the inner city but you will be dependent on busses and taxis or have to walk.
Lodging is the largest cost factor during a visit to the San Fermin Fiesta. You can mitigate the cost by arriving at the tale end of the Fiesta when the crowds thin out a little. Other people also choose to sleep in the city parks – Pamplona is the only Spanish city to have legalized washing in the public fountains.