The Curonian Spit (Lithuanian: Kuršių nerija, Russian: Куршская коса, German: Kurische Nehrung, Latvian: Kuršu kāpas) is a 98 km long, thin, curved sand-dune spit that separates the Curonian Lagoon from the Baltic Sea coast. Its southern portion lies within Kaliningrad Oblast, Russia and its northern within southwestern Lithuania.