Trail Marathon Heidelberg in 2025, a running event organized in Heidelberg (Germany) on 21 September. During the 3 races were held event. Base Trail (⨦ 20.5 km / + 850 m) in class RMT2 with average terrain slope 4% (G4). Heart Core Trail (⨦ 44 km / + 1 500 m) in class RMT3 with average terrain slope 3% (G3). Half Trail (⨦ 31 km / + 1 050 m) in class RMT2 with average terrain slope 3% (G3).