Irkutsk Oblast topographic maps

Average elevation: 430 m

Average elevation: 1,142 m

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Average elevation: 673 m

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Average elevation: 522 m

Average elevation: 578 m

The Lena originates at 1,640 meters (5,381 ft) of elevation in the Baikal Mountains, 7 kilometres (4 mi) west of Lake Baikal, south of the Central Siberian Plateau. The Lena flows north-east and traverses the Lena-Angara Plateau, then is joined by three tributary rivers: (i) the Kirenga, (ii) the Vitim, and…

Average elevation: 347 m

Average elevation: 554 m

Average elevation: 1,292 m

Average elevation: 652 m

Average elevation: 446 m

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Average elevation: 307 m

Average elevation: 339 m

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Average elevation: 476 m

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Average elevation: 441 m

Average elevation: 1,423 m

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Average elevation: 437 m

Average elevation: 344 m