Ultra Challenge 2024 Calendar. Plan your next ultra marathon with this complete event calendar for north american ultra running events including trail races and road races. With 18 events, 4 distance choices, continuous or a ‘2 day daylight’ 100 km option with camping if you want to ‘step it up’, a few ‘trail marathons’, a dozen 10 km ‘tasters’, and a new ultra.
With 18 events, 4 distance choices, continuous or a ‘2 day daylight’ 100 km option with camping if you want to ‘step it up’, a few ‘trail marathons’, a dozen 10 km ‘tasters’, and a new ultra. A new end of season ultra.