For Darlene Corkrum, a 66 year-old runner from Seattle, Monday’s Boston Marathon was both just another marathon and, at the same time, a special marathon. It was Corkrum’s 30th lifetime marathon...

It was a feat nothing less than spectacular: in the 2014 Boston Marathon, Kenyan runner Rita Jeptoo defied the odds and won a third female title. Jeptoo won for the first time in 2006, then again in 2013....