There's no definitive "end" time, however, most of the family friendly festivities are pretty much gone by around 9:30. Most everyone, by that point, has headed to a bar.
Most of the street musicians will keep playing as long as there's a crowd. We also have a free concert at the Palace Theater at 8 pm (open-air venue at Main & 26th), featuring Cleghorn, a Celtic rock band. They put on a great show, so join us tonight!