Transbaikal, Trans-Baikal, Transbaikalia (Russian: Забайка́лье, tr. Zabaykalye; IPA: [zəbɐjˈkalʲjɪ]), or Dauria (Даурия, Dauriya) is a mountainous region to the east of or "beyond" (trans-) Lake Baikal in Russia. The alternative name, Dauria, is derived from the ethnonym of the Daur people. It stretches for almost 1,000 km from north to south from the Patomskoye Plateau and North Baikal Plateau to the Russian state border.