SPECTATOR BASICS

Before and after the race, participants will gather and Boston Common, and spectators are welcome.
The race begins at 8:00 a.m., and it will take all entrants about 20 minutes to cross the starting line, with the fastest departing first.
There is a checkpoint timing mat at the half-way (3.1-mile) mark of the race course.
To see your favorite participant twice, we recommend viewing the race from Commonwealth Avenue, either in Boston's Back Bay neighborhood, or by Boston University.
Note that for the first mile of the race, participants will be densely packed together.
The race course leads participants West on Commonwealth Avenue, detours around Kenmore Square, and at Boston University, returns to Commonwealth Avenue West until the turnaround point.
Athletes will then return on "Comm. Ave" East until Kenmore Square, veer left onto Beacon Street, turn right onto Charlesgate West, and then, with a left turn, return to Comm. Ave East, darting through the Back Bay until a loop around the Public Garden.

For a description of road closures along the course, click below: