The border starts in the west at the western tripoint with China, located just 100 kilometres (62 m) east of the China-Kazakhstan-Russia tripoint. It then proceeds overland in a broadly north-east direction through the Altai Mountains, up to the vicinity of Mongolia's Uvs Lake, briefly cutting into the lake so as to leave the far north-eastern corner in Russia. The border then proceeds eastwards via a series of overland lines, angled slightly to the south-east; this section also cuts across Lake Tore-Khol. The border then turns north across the Ulaan Taiga mountains, forming a broad arc through the Sayan Mountains around Mongolia's Lake Khövsgöl. The border continues overland eastwards, arching broadly north (a short part of which utilises the river Chikoy) and then south in two long arcs, before turning north-east and then east, skirting south of Russia's Lake Barun-Torey, to terminate at the eastern Chinese tripoint.