The man who was visiting from the Basque town of Errenteria died on the spot when he was charged in the chest by a bull at the start of the run in the central town of Cuéllar.
As usual someone captured the footage of the fatal goring and posted it on YouTube.
The horrific footage shows the man being charged by the bull and dragged several meters. He was already dead by the time emergency medical staff reached him.
"The descent was rapid and dangerous," the organisers of the run said. "One of the bulls gored a person who was on the urban side of the run," which then goes on to the countryside.
The run at Cuéllar, a town with a population of 10,000 north of Madrid, is one of the oldest in Spain and dates back to the 13th century.
Most bull runs are held in August and September when towns hold festivals in honour of patron saints.
Nearly 16,000 town festivals will include bull events this year, nearly 2,000 more than last year, according to culture ministry figures.