Billed as "N30" by activists, the marches were intended to renew attention to the actions of the World Trade Organization. Opponents maintained that the international body was detrimental to human rights and to the environment. The main march of about 1,000 began at Seattle Central Community College and proceeded with a police traffic escort to Westlake Mall, arriving at about 4:00 p.m. The gaily attired, dancing, chanting, and generally peaceful crowd blocked traffic at 4th Avenue and Pine Street for several hours.
Police directed the crowd to Capitol Hill and demonstrators complied, but returned to Westlake Mall. The remaining protesters, about 500, were ordered to disperse by police and they moved, but only one block whereupon they sat down in the street. The police ordered them to move and they did, a block at a time. At Blanchard Street the officers surrounded those who sat down in the street. Approximately 140 were arrested.
Four protesters were arrested for felonies for the throwing of firecrackers or other objects at police. One officer, a captain, was seriously injured in the eye and hospitalized. One man was arrested before the demonstrations for emailing threats to city officials. All other arrests were for misdemeanors. There were no reports of property damage.