Sudovian Upland

Sudovian Upland (Lithuanian: Sūduvos aukštuma) or Sūduva Heights is a hilly terrain in the south-west of Lithuania, north-eastern Poland, and eastern Kaliningrad Oblast.

The current terrain of the uplands was formed after the last ice age as a result of repeated regressions during warmer periods and progressions during colder periods.

The topography is hilly with rolling terrain.

The northern part is dominated by large and medium-sized hills of morainic loam, the southern edge by small gravelly and sandy hills.

The Peršėkė and Šešupė rivers flow through the Sudovian Upland.