Where is Marks?

Privolzhskoye2.7 km · 1.7 mi → Marksovskiy Rayon7.7 km · 4.8 mi → Voskresenskiy Rayon17.9 km · 11.1 mi → Voskresenskoye18.0 km · 11.2 mi → Podlesnoye21.4 km · 13.3 mi → Krasnyy Yar24.3 km · 15.1 mi → Yelshanka26.6 km · 16.5 mi → Sovetskoye29.9 km · 18.6 mi → Sinodskoye31.7 km · 19.7 mi → Stepnoye37.5 km · 23.3 mi → Shumeyka38.2 km · 23.8 mi → Saratovskiy Rayon40.3 km · 25.0 mi →

Aleksandrov Gay50.14704, 48.57037 → Alekseyevka52.30583, 48.02611 → Arkadak51.93261, 43.49779 → Atkarsk51.87185, 45.00775 → Atkarskiy Rayon51.91667, 45.00000 → Balakovo52.02782, 47.80070 →