I believe that some people expressed a wish to come with me and endanger their limbs running away from bulls in Pamplona.
During July 6th - July 14th
Read all about it here
Update
Read all about my trip to St Fermin ( [What I Did In Spain ( other than sleeping )] or see the photos here. In brief, the festival is very hectic indeed. We did not get anywhere to stay in St Fermin it's self ( although our pre-planning never happened and we just kind of turned up in Pamplona on the Sunday ). We did camp about 40K away from Pamplona and you can easily get there by coach for a ridiculously cheap fare. These coaches run all night but do not leave from the same place they drop you off at. The one we caught back ( around midday ) left from the Coach Station.
Look after your wallets and valuables - members of my party didn't and were pick-pocketed at some point during the evening. Wander around lots and stop off in as many bars as you can. Try and follow the brass bands around, but do this early because they seem to disappear around 2-3AM ish.
If you want a rest or chill out from the hectic ( and progresivley more littered and stinking streets ) go to the ramparts, there is a kind of grassy area with some bars which is nice but it can get quite cold.
If you want to watch the Bulls turn up when they start to erect the fence ( I think this just after 5:30 AM ) and, very importantly, get on the right side of it ! I watched from the corner of Estefella ( there is a shop here open until 5:30 ish selling fags and food and stuff ) where there is a double fence. Many people thought "Ah Ha ! I'm not standing by the further back fence when I can sit on the one right by the run", people obviously also thought things like "Ho Ho ! I'll climb onto this balcony, shop front etc and get a great view. The police here will never be able to move me". This is all fine until 20mins before the run when hordes of police arrive and are very strict about everyone ( except runners )being behind the second fence and most definatley not hanging off balconies, shop fronts and other street furniture. The police will not hesitate to give any one who annoys them a good kicking and test their truncheons out on you - seriously do not mess !
The bull running lasts about 0.002 micro seconds so be alert ! Finally make sure you where the red and white outfit - everyone, absoloutley everyone else is and you will look silly if you aren't.

