Khalkhyn Gol

Halh River (Халх гол)
Khalkha River
River
Countries	Mongolia, China
Mongolian Aimag	Dornod
Chinese Region	Inner Mongolia
Chinese Prefecture	Hulunbuir
Source
- elevation	1,443 m (4,734 ft)
- coordinates	47°04′51″N 120°29′16″E
Mouth	Buir Lake
- elevation	583.1 m (1,913 ft)
- coordinates	47°53′44″N 117°50′08″E
Length	233 km (145 mi)
Basin	17,000 km2 (6,564 sq mi)
Discharge
- average	25 m3/s (883 cu ft/s)

The Halh River (also spelled as Khalkha River; Mongolian: Халх гол; Chinese: 哈拉哈河; pinyin: Hālāhā Hé) is a river in eastern Mongolia and northern China's Inner Mongolia region.

The river's source is in the Greater Khingan mountains of Inner Mongolia. By the mouth it splits into two distributaries. The left one (Halh River proper) feeds the Buir Lake and next via this lake continues as Orchun Gol. The right one Shariljiin Gol (Mongolian: Шарилжийн гол) runs directly into the Orchun Gol.

In April–September 1939, the river was the site of the Battles of Khalkhin Gol, one of the Soviet-Japanese border conflicts. Soviet and Mongolian forces defeated the Japanese Kwantung Army.