I watched Captain America The Winter Soldier today, and at the beginning of the movie Steve Rogers(Captain America) is shown running really fast all over the place. Then after he finishes the run his friend say that Steve ran 13 miles in 30 minutes, doing a little math that's 2:18 pace. If that's just an easy run for Steve, how fast would he be from say 800m up to the marathon assuming he had equal speed and endurance?