4. Kleeblattultra

The Kleeblattultra is a 100-mile run starting in Schwarme, a village in Lower Saxony, Germany. This 160 km ultramarathon is designed for runners prepared for an extended period on foot, with the challenge stemming from distance, patience, and preparation rather than elevation or technicality. The course consists of four loops extending in the cardinal directions, reflecting the race name: “Kleeblatt” translates to cloverleaf in German. The paths are runnable, crossing open country with tranquil surroundings and scenic elements instead of significant ascents or rugged trails, making it suitable for experienced ultrarunners seeking a 100-mile challenge without a highly technical mountain route.