Infinitus

Infinitus opens on May 20, 2027, in Ripton, Vermont, with every distance starting at 8:00 a.m. The formats run from the marathon (26.2 mi) and 88K up through a 100-miler, a penta marathon of 211 km, a 250-miler, a deca marathon of 422 km and, at the far end, 888 km.

Beyond about a hundred miles, running becomes an exercise in sleep management rather than in endurance: the runners who finish an 888K are the ones with a plan for when and how long they will lie down. If you are drawn to this end of the sport, build up through the shorter formats on the same terrain first — Vermont's Green Mountain trails are rooted, wet and slow, and the distance figures translate poorly into hours.