The Couch-to-5K ® Running Plan. By Josh ClarkPosted Saturday, 1 January, 2011 Couch to 5K ® | Beginning Running First off, you may be asking, "exactly how many miles is a 5K?
" A 5K is 3.1 miles. We're here to help you achieve your goal of beginning to run your first 5K. Too many people have been turned off of running simply by trying to start off too fast. Tmgrin. Khan Academy. Track Workouts And Level Up.