Lena
The Lena is a major river in eastern Siberia, Russia, flowing from the Baikal Mountains to the Laptev Sea.
Also known as: Lena River
How big is it?
4,400 km long
Also 2,734 mi
Approximate main-channel length · approximate
Typical recorded range: 4,350 km to 4,450 km.
A little perspective
About the same scale as Callisto.
Callisto: Callisto is a natural satellite of Jupiter, with a heavily cratered icy surface.
Measurements, assumptions & sources +
Lena
The Lena is approximately 4,400 km long from its Baikal Mountains headwaters to the Laptev Sea. Source selection and channel-centreline conventions affect the total.
Encyclopaedia Britannica — Lena River
The marked approximate main-channel length is calibrated. Unmeasured illustration details are representative.
Callisto
Rounded mean-radius model of Callisto. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
NASA JPL — Planetary satellite physical parameters
The marked mean diameter is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 4,400 km
For comparison, this page uses approximate main-channel length. This is labelled approximate; the central value is useful for comparison, while real values or measurement solutions can vary. The recorded range is 4,350 km to 4,450 km.
The Lena is approximately 4,400 km long from its Baikal Mountains headwaters to the Laptev Sea. Source selection and channel-centreline conventions affect the total.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
Lena dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 4,400 km | 4,350 km to 4,450 km | approximate |
Around this scale
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These links use compatible length records, ordered around the selected value.
Nearest lower value · PlacesMekong4,350 kmThe Mekong is a river in Southeast Asia, originating on the Tibetan Plateau and flowing to the South China Sea.Around the same scale · PlacesYenisei5,539 kmThe Yenisei is a major river in Siberia, Russia, flowing northwards from Mongolia to the Arctic Ocean.Nearest higher value · PlacesOb–Irtysh system5,410 kmThe Ob–Irtysh system is a river network in western Siberia, Russia and Kazakhstan, formed by the Ob River and its main tributary, the Irtysh.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- Encyclopaedia Britannica — Lena RiverApproximately 4,400 km from headwaters near Lake Baikal to the Laptev Sea.
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PlacesYenisei5,539 kmThe Yenisei is a major river in Siberia, Russia, flowing northwards from Mongolia to the Arctic Ocean.PlacesOb–Irtysh system5,410 kmThe Ob–Irtysh system is a river network in western Siberia, Russia and Kazakhstan, formed by the Ob River and its main tributary, the Irtysh.
SpaceCallisto4,821 kmCallisto is a natural satellite of Jupiter, with a heavily cratered icy surface.
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SpaceTitan5,150 kmTitan is a natural satellite of Saturn, with a thick nitrogen-rich atmosphere and surface lakes of hydrocarbons.
SpaceGanymede5,262 kmGanymede is a natural satellite of Jupiter and contains a magnetic field generated by its partially liquid core.
SpaceIo3,643 kmIo is a natural satellite of Jupiter, covered with active volcanoes and sulphur deposits.
SpaceMoon3,475 kmThe Moon is Earth’s natural satellite and the brightest large object in Earth’s night sky.