Typically yes, but say you bought tickets to an event for the specific day before the run was announced (as I did). Say you have to work as some have to on Saturdays, or maybe you have an emergency. I'll be honest in that I don't think it's the end of the world in most scenarios and I wouldn't want to see it canceled entirely but people get to complain that the most densely packed area of the city that also has the most traffic problems gets blocked off. I wish they could move it to a different area of Bmore or have it end earlier or coordinate alternative routes and inform people earlier/better. Also if Baltimore had a better track record in taking citizen concerns more seriously there likely wouldn't be so much gripe.