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Steinbruch Marbach‑Rielingshausen (KLÖPFER‑Steinbruch), Häldenstraße 100, 71672 Marbach am Neckar (Rielingshausen), Germany
ROCKS & RUN 3. Rielingshäuser Steinbruch-Lauf is a quarry trail running event staged in the Klöpfer stone quarry at Rielingshausen. The main competition is a two‑hour challenge on an approximately 2.5 km lap where participants complete as many laps as possible, while a Youngster run (≈2.5 km) and a Kids run (≈500 m) take place beforehand. The course is notable for its rocky terrain, clear elevation changes and a spectator‑friendly start/finish area inside the quarry.
Timing for the Main‑Run is by disposable transponder issued with the race bib and all Main‑Run finishers receive a medal; the Kids and Youngster races are free to enter. The event is organised by HSG Marbach‑Rielingshausen with registrations handled via RaceResult and proceeds going to a local youth project. On‑site services include water in the start/finish area, limited parking and first‑aid support from the Deutsches Rotes Kreuz.