| Ider River | |||||||||||
| Name Other: | Ider gol | ||||||||||
| Name Etymology: | Mongolian: Ider, "young, youthful") | ||||||||||
| Subdivision Type1: | Country | ||||||||||
| Subdivision Name1: | Mongolia | ||||||||||
| Subdivision Type2: | Aimags | ||||||||||
| Subdivision Name2: | Zavkhan, Khövsgöl | ||||||||||
| Length: | 452km (281miles) | ||||||||||
| Discharge1 Avg: | 57m3/s | ||||||||||
| Source1 Location: | Khangai Mountains | ||||||||||
| Source1 Coordinates: | 47.9131°N 97.9503°W (approximately) | ||||||||||
| Source1 Elevation: | 2850 m (approximately) | ||||||||||
| Mouth: | Selenge | ||||||||||
| Mouth Location: | Olon golyn bilchir | ||||||||||
| Mouth Coordinates: | 49.2611°N 100.6792°W | ||||||||||
| Basin Size: | 24555km2 | ||||||||||
| Tributaries Right: | Chuluut River | ||||||||||
| Extra: |
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The Ider River (Mongolian: Идэр гол,, or Mongolian: Идэрийн гол,, "Young River") is a river in the Khövsgöl and Zavkhan aimags in northwestern Mongolia and is, together with the Delgermörön river, one of the sources of the Selenge river. It is long, and has a drainage basin of .[1] The source is in the Khangai range, the confluence with the Delgermörön is in Tömörbulag. The river is frozen 170–180 nights per year. There is a wooden bridge, which was built in 1940, near Jargalant and a concrete bridge in Galt.