Lena (river)

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Lena
The Lena Pillars along the river near Yakutsk
Lena watershed
Native name	Лена (Russian) Өлүөнэ (Yakut) Елюенэ (Evenki) Зүлхэ (Buryat) Зүлгэ (Mongolian)
Location
Country	Russia
Physical characteristics
Source	Baikal Mountains
• location	Kachugsky District, Irkutsk Oblast
• coordinates	53°58′3″N 107°52′56″E / 53.96750°N 107.88222°E / 53.96750; 107.88222 (approximately)
• elevation	1,640 m (5,380 ft)
Mouth	Lena Delta
• location	Arctic Ocean, Laptev Sea
• coordinates	72°24′31″N 126°41′05″E / 72.4087°N 126.6847°E / 72.4087; 126.6847
• elevation	0 m (0 ft)
Length	4,294 km (2,668 mi)
Basin size	2,460,742 km2 (950,098 sq mi) to 2,490,000 km2 (960,000 sq mi)
Width
• maximum	10,000 m (33,000 ft)
Depth
• maximum	28 m (92 ft)
Discharge
• location	Kyusyur, Russia (Basin size: 2,440,000 km2 (940,000 sq mi) to 2,418,974 km2 (933,971 sq mi)[1]
• average	(Period of data: 1971-2015)17,773 m3/s (627,600 cu ft/s)[1] (Period of data: 1970-1999)17,067 m3/s (602,700 cu ft/s)[2] 15,500 m3/s (550,000 cu ft/s)[3]
• minimum	366 m3/s (12,900 cu ft/s)
• maximum	241,000 m3/s (8,500,000 cu ft/s) Lena Delta, Laptev Sea, Russia (Period of data: 1984-2018)577 km3/a (18,300 m3/s)[1] (Period of data: 1940-2019) 545.7 km3/a (17,290 m3/s)[4]
Discharge
• location	Vilyuy
• average	12,100 m3/s (430,000 cu ft/s) Tabaga, Yakutsk (Basin size: 987,000 km2 (381,000 sq mi) (Period of data: 1967-2017) 7,453.2 m3/s (263,210 cu ft/s)[5](max. 51,600 m3/s (1,820,000 cu ft/s))[5]
Discharge
• location	Olyokminsk
• average	4,500 m3/s (160,000 cu ft/s)
Discharge
• location	Vitim
• average	1,700 m3/s (60,000 cu ft/s)
Discharge
• location	Kirensk
• average	480 m3/s (17,000 cu ft/s)
Basin features
Tributaries
• left	Vilyuy
• right	Kirenga, Vitim, Olyokma, Aldan

The Lena ^{[note 1]} is a river in the Russian Far East, and is the easternmost of the three great Siberian rivers that flow into the Arctic Ocean (the other two being the Ob and the Yenisey). The Lena is the eleventh-longest river in the world, and the longest river entirely within Russia, with a length of 4,294 km (2,668 mi) and a drainage basin of 2,490,000 km² (960,000 sq mi).^[6] Permafrost underlies most of the catchment, 77% of which is continuous.

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