Which distance is NOT a commonly used road race distance to promote healthy competition?

• A. 15K (9.3 miles)
• B. 5K (3.1 miles)
• C. 10K (6.2 miles)
• D. Half-marathon (13.1 miles)

Answer: (A)

A distance I often see in road racing calendars, but not as widely used as the others, is the fifteen-kilometer option. The five-kilometer, ten-kilometer, and half-marathon are standard distances that appear in many races, making them easy to train for, compare times, and organize around in clubs and programs. They provide clear, gradual steps in difficulty and fit well with common training plans, safety considerations, and course logistics. Fifteen kilometers, while it exists in some events, doesn’t have that same level of universal adoption, so it’s less reliable for promoting broad, healthy competition across a wide range of runners.