The BiMa 100 HTN is a 100 km trail race beginning in Witzenhausen-Kleinalmerode, Germany, featuring approximately 2,000 meters of elevation gain. Participants are allotted 16 hours and 45 minutes to complete the course, marking it as a substantial ultra-distance event rather than a brief mountain race. Sport4you e.V. organizes the race, with Gerno Semmelroth serving as the contact.
The course incorporates the BiMa Ultra 57 route, extending it with a loop along the Werratalradweg to Wahlhausen and returning to Kleinalmerode. Portions of the path traverse a state road and the Werratalradweg, meaning it is not exclusively narrow trail. This marks the second running of the 100 km race, and registration is available on-site, with options to enter through friends or acquaintances.