The women's running pioneer is launching a new clothing collection with Skirt Sports this summer.
She was the first official female finisher of the Boston Marathon.
They say they have more determination to run after the tragedy.
An all-male sport at the inception of the first running boom, recreational running is now dominated by women.
It's a driving force behind the second "running boom".
The important milestone will be commemorated this year at the race's start.
She is a history-making runner, women's running advocate, commentator, and author.