Bolshaya Sludka (Russian: Большая Слудка) is a rural locality (a village) and the administrative center of Belosludskoye Rural Settlement of Krasnoborsky District, Arkhangelsk Oblast, Russia.

[2] Bolshaya Sludka is located 16 km northeast of Krasnoborsk (the district's administrative centre) by road.

Tolsha 1-ya is the nearest rural locality.

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