Tue
26
May
IKK BB Firmenlauf Potsdam
Potsdam, DE
Wed
27
May
B2Run Hannover
Hannover, DE
Wed
27
May
Seligenstädter Marathontaffel
Seligenstadt, DE
Wed
27
May
Steglitzer Volkslauf
Berlin, DE
Wed
27
May
30. Steglitzer Volkslauf
Berlin-Lichterfelde, DE
Wed
27
May
AOK-Firmenlauf Bielefeld
Bielefeld, DE
Thu
28
May
dm Firmenlauf Bad Kreuznach
Bad Kreuznach, DE
Thu
28
May
Kölner Leselauf
Köln, DE
Thu
28
May
AOK-Firmenlauf Oer-Erkenschwick
Oer-Erkenschwick, DE
Thu
28
May
Vatertagslauf für Jedermann
Rhaunen, DE
Fri
29
May
37. Lauf Rund um Burg
Burg, DE
Fri
29
May
38. Raesfelder Mai-Lauf
Raesfeld, DE
Fri
29
May
41. Michelstädter Stadtlauf
Michelstadt, DE
Fri
29
May
Nacht von Hasbergen
Hasbergen, DE
Fri
29
May
Sommerabendlauf am Auensee
Leipzig, DE
Fri
29
May
Stundenlaufserie Falkenstein
Falkenstein, DE
Fri
29
May
VfL Ahaus Stadtfestlauf
Ahaus, DE
Fri
29
May
26. Volksbank-Lauf "Rund um den Offlumer See"
Neuenkirchen, DE
Fri
29
May
42. Abendlauf Wilstedt bei Nacht
Wilstedt, DE
Fri
29
May
Bentfelder Abendlauf
Delbrück, DE
7. e2h10k-100km Ultrarace
Saturday, October 3, 2026 · Calw-Altburg, Germany
Distances
100km
About this race
e2h10k is a trail ultrarace held in Calw-Altburg, located in the northern Black Forest. The start and finish are situated at the sports field. The name translates to “every 2 hours 10 kilometers”: participants begin a 10 km trail loop, return within two hours, and then re-enter the queue for the subsequent loop. The complete race consists of 10 loops covering 100 km, with an alternative 5-loop option for 50 km. Each loop features approximately 320 meters of elevation gain, meaning the full distance presents a demanding day of continuous ascents rather than a straightforward point-to-point run.
The course predominantly follows trails and hiking paths, with minimal sections of asphalt. This format emphasizes pacing as much as physical conditioning. Participants who exceed the two-hour limit or do not start the next loop are disqualified, contributing to the reported dropout rates exceeding fifty percent of the field. The event is designed for seasoned long-distance runners, featuring a restricted number of participants and fostering a sense of community over a large-scale city marathon atmosphere. Runners completing all 10 loops are awarded a notably large medal, a suitable reward for a race where maintaining participation is the primary objective.
Start location
Calw-Altburg