What is the Ernest Hemingway story that tells about the "running of bulls" in Spain?

One of the greatest of all American novels is Ernest
Hemingway's The Sun Also Rises. It tells the story of a group of
American ex-patriots living in Paris during the decade following World War I. The story
is set in several locales, particularly Paris, and Hemingway's description of the
nightlife and debauchery of the French capital in the 1920s is probably the most
memorable ever set to print. The latter section of the novel is dedicated to the
Festival of San Fermin, in Pamploma, Spain--another example of wild drinking and sexual
tension run amok--and highlighted by the famous "running of the bulls." Although the
event had been staged for many years, Hemingway's novel put this festival on the map,
transforming it into an international destination for many tourists seeking a dangerous
twist to their travels.