Matt Bauer was also part of a group from Cardiff running the Boston Marathon yesterday.
Pictured on the right here, with his friend Stuart Trimby, he told us he feels very lucky at having crossed the line just one minute before the explosions happened.
At least three people were killed in the blasts, and more than 100 injured.
More top news
North Wales Chief Constable Mark Polin met with town councillors and residents to discuss the issue of crime in Rhyl.
Martin Tate taunted North Wales Police via a Facebook appeal for him by saying "see who has the last laugh now".
The 25-year-old, known locally as Bilal, was arrested on Tuesday in Newport. Two men were also arrested the following morning in the city.