What is an endurance series?

A series ties a set of races together under one banner, with shared rankings, points, and usually a championship or final that the season builds toward. Some are built around a single discipline and region, like a gravel circuit that moves between mountain towns across a summer. Others span continents, like the world tours in trail running and gravel where results at one stop carry over to the next.

The structure matters most when a qualifying spot is on the line. A qualifier series feeds a bigger race: finish well at a designated event and you earn entry, points, or a lottery ticket toward a destination like Western States or UTMB. For most riders and runners that framing is aspirational, a reason to target one race and see how the season unfolds. For the riders and runners chasing a start line at the sport's biggest events, it is the map.

Whether you want to follow one circuit all season or simply find the next good race near you, every series below links straight to its full race calendar, the countries it visits, and the events you can enter now.