Where is Piterka?

Krasnyy Kut45.1 km · 28.0 mi → Novouzensk55.1 km · 34.2 mi → Mokrous62.1 km · 38.6 mi → Pushkino70.0 km · 43.5 mi → Stepnoye88.2 km · 54.8 mi → Yershov94.6 km · 58.8 mi → Sovetskoye98.0 km · 60.9 mi → Rovnoye98.7 km · 61.4 mi → Aleksandrov Gay99.3 km · 61.7 mi → Dergachi111.0 km · 69.0 mi → Marksovskiy Rayon117.7 km · 73.1 mi → Privolzhskoye123.2 km · 76.6 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 →