Race Types & Distances
5K, half marathon, marathon, ultra, triathlon distances, and every race format explained.
Terms in This Category
7 terms5K
3.1-mile road race — the most popular distance worldwide and a gateway to competitive running.
10K
6.2-mile road race — a middle distance that blends speed endurance with aerobic fitness.
Half Marathon
13.1-mile race and one of the fastest-growing distances in road running.
Marathon
26.2-mile race — the classic endurance distance inspired by the legend of Pheidippides.
Ultramarathon
Any race longer than a marathon (26.2 miles). Common distances include 50K, 100K, and 100 miles.
Sprint Triathlon
Beginner-friendly triathlon: 750m swim, 20K bike, 5K run. Perfect first multi-sport race.
Ironman
Full-distance triathlon: 2.4-mile swim, 112-mile bike, 26.2-mile run. The ultimate endurance test.
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This category covers key terms, concepts, and techniques used in endurance sports. Browse the terms below to learn definitions, training applications, and how they relate to your racing goals.
Each term page links to upcoming races and events. You can also search for specific race types or browse our events page filtered by discipline and location.