The IAAF Silver Label Road Race attracted thousands to Spain's capital city.
Photographer Kevin Morris spent Monday shooting photos at the 120th running of the Boston Marathon.
A memorable day of racing in Boston.
Scenes from the coastal half marathon in Honolulu, Hawaii
Thousands raced in optimal conditions in Raleigh, North Carolina.
The 8K took place in cold weather with several big names leading the field.
An exciting day of racing in Cardiff, Wales, determined the world champions in the half marathon. In the end, Geoffrey Kamworor and Peres
the nighttime half marathon in Mexico's capital city welcomed thousands.
Humana Rock ‘n’ Roll Dallas kicked off with 5K It was a chilly morning in the ‘Big D’ as more than 300 runners toed the start line
A look at the day's races, in pictures.