Doing a 5K run can add a new level of challenge and interest to your exercise program. A 5K run is 3.1 miles. Don't be daunted by the distance. A 5K run is a great distance for a beginner. You can prepare for a 5K run in just two months. Consider using this seven-week 5K run training schedule as your guide. This 5K run training schedule was created by Olympian Jeff Galloway.