Articles

Articles on race seasons, race-day weather, and the US race calendar, based on the Endurance Grid race calendar.

Trail RunningWhen Is Trail Running Season?When the trail races on the Endurance Grid calendar happen, month by month, how many states have them, where the winter races are, and what distances they offer.Updated November 8, 2026
RunningWhen Is Marathon Season?When the marathons on the Endurance Grid calendar happen, month by month, how many states have them, and where the winter races are.Updated November 8, 2026
LearnThe 2026 Race Calendar by the NumbersWhat the races on the Endurance Grid calendar looked like in 2026 so far, by sport, month, state, day of the week, and distance.Updated November 8, 2026
TriathlonWhen Is Triathlon Season?When the triathlons on the Endurance Grid calendar happen, month by month, how many states have them, where the winter races are, and when the sprint triathlons are.Updated November 8, 2026
RunningWhen Is Half Marathon Season?When the half marathons on the Endurance Grid calendar happen, month by month, how many states have them, and where the winter races are.Updated November 8, 2026