there are 26 bull riders in a contest.
8 seconds.
http://www.cornycreeklivestock.com/bullriderskilledridingmemorial.htm
Each morning from the 7th through the 14th of July, six fighting bulls and six steers run in the encierro during Pamplona's Fiesta de San FermÃn.
Six fighting bulls, accompanied by six steers, run each morning during the 8 days of the Feria del Toro in Pamplona. The number of bulls in other bull festivals varies, depending on the fiesta.