The 117th Boston Marathon takes place on Monday.
Here & Now's Alex Ashlock has been speaking to some of the top runners and joins us from race headquarters to tell us what he's hearing.
He'll also tell us about one of the many groups running for charity: Team NewtownSTRONG.
The team is running to support NewtownSTRONG, a charitable foundation raising scholarship money for the siblings of children lost in the mass shooting at Sandy Hook Elementary School in Newtown, Conn. on December 14, 2012.
"In the first 20 miles we're honoring our 20 Sandy Hook first graders, and when we crest Heartbreak Hill and we're coming back towards Boston, we run the final six for our six fallen educators who gave everything of themselves, including their lives, to protect our children," said Laura Nowacki, who is part of the team, and whose fourth grade daughter survived the shooting.
This segment aired on April 12, 2013.