|Progression||Pregolya→ Baltic Sea|
The Instruch (Russian: Инструч; German: Inster; Lithuanian: Įsrutis; Polish: Wystruć) is a river in Russia's Kaliningrad Oblast. It develops northeast of Dobrovolsk (formerly Pillkallen, Schlossberg between 1938-1946) and, along with the Angrapa River, forms the Pregolya near Chernyakhovsk.
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