Kenyans Sweep, Switzer's Bib Is Retired: Big Moments In The 121st Boston Marathon

Thousands of runners are waking up sore but satisfied Tuesday morning. They finished the 121st running of the Boston Marathon.

The race started as it always does, on a Monday morning out in Hopkinton. Even at 6 p.m., people were still crossing the finish line down on Boylston Street.

WBUR's Alex Ashlock covered the marathon and joined Morning Edition to talk about the race.