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5 Ultrarunners Who Are Running the Boston Marathon

They've made their name in ultras, but they're leaving the trails behind for one day in Boston.

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The Boston Marathon elite field is impressive enough, but a closer look at the race entrants found a few more elite runners—elite ultrarunners, to be more specific.

Several runners who have found great success in ultras are taking a break from the trails and running the Boston Marathon on Monday. Here’s a look at a few of them: