Sounds like it's first week of July (5th-13th), ending with the Running of the Bulls. There is a group that comes from the U.S., you would most likely rent a bike unless you want to ship yours which is doubtful. The fee ($2864 with todays rate) covers fairy from and back to the U.K, they do rent bikes for the event but as to cost, no idea.
Sound like something anyone here would be interested in? I'd really love to do it this year but with getting married and all and a new job I don't know how feasible it will be
I'd love to get a long distance trip say from Denver-LA and back so if anybody is interested maybe we should start tentatively planning, but traveling to a foreign country and getting "cultured" makes a good excuse to join this one
http://cannonballism.com/
https://www.facebook.com/groups/311000265604901/