I have been having some trouble finding information on the history of the Running of the Bulls tradition in Pamplona, Spain. Mostly I have found stories of peoples' experiences or protests against the tradition (or sarcastic views of the traditions like this).

Could I have some suggestions for sites to use? Thanks!

This one is pretty good. Hope it helps!
http://www.spanish-fiestas.com/spanish-festivals/pamplona-bull-running-san-fermin.htm

http://www.pamplona.net/VerPag.asp?IdPag=944&Idioma=5

http://www.spanish-fiestas.com/spanish-festivals/pamplona-bull-running-san-fermin.htm

This is the best of what I found.

Thanks, Doriangreyed and Kwll!

Try this also;
therunningofthebulls.net

Thanks for the link, Jack McDonald.