Around 8,000 runners will descend onto the center of Prague to take part in the annual event, which gets underway at 9 a.m. The race starts at Old Town Square, and runs through Celetná, Na Příkopě, and Národní streets, all of which will be closed to motor traffic. All roads should open by about 3 p.m., or whenever the race completely finishes, although members of the public may watch the action from the sidewalks.