Across high-altitude mountain stages on Mount Sandras (Köyceğiz / Muğla, 1,070 m – 2,060 m), aid-station closing windows govern runner safety. Raw GPX logs recorded along the steep Ağla canyon and dense forest canopy contained single-point multipath jumps that inflated cumulative climb toward +3,850 m D+, distorting cutoff times at Kartal Lake.
Instead of destructive smoothing that erases primary field evidence, Praksis Event Systems v2.4 (SPEC-03) pairs Haversine horizontal integration with DEM-checked gradient thresholds. Across 3,328 raw GPS trackpoints, 19 anomalous elevation jumps are flagged in place as `SUSPECT` inside quarantine while downstream cutoff math integrates strictly over `VERIFIED` segments.
Binding the verified 68.44 km distance and +3,515 m D+ climb to the ITRA KM-Effort ratio (`68.44 + 3515/100 = 103.59`) aligns every checkpoint window with true physiological workload. When weather forces pre-race reroutes across the 70K, 50K, 24K, 10K, and 5K categories, all cutoff schedules recompute deterministically with zero spreadsheet drift.