A 2-kilometer, or 2K, run is the equivalent of approximately 1.24 miles. Put another way, it is 1 mile and slightly over 427 yards. A 2-kilometer run is a good running distance with which to start for beginners who are not ready to tackle the demands of a 5-kilometer run.
One kilometer equals 0.6214 miles, or a little more than half of a mile. A 5-kilometer run is 3.1 miles, and a 10-kilometer run is 6.2 miles. A marathon, the goal of many serious runners, is 26.2 miles, or 42 kilometers. A marathon is the equivalent of 21 2-kilometer runs.