The Huma River is a right tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 on the northern loop of the Amur River in China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

's province of Heilongjiang

Heilongjiang

For the river known in Mandarin as Heilong Jiang, see Amur River' is a province of the People's Republic of China located in the northeastern part of the country. "Heilongjiang" literally means Black Dragon River, which is the Chinese name for the Amur. The one-character abbreviation is 黑...

. It starts in the Greater Khingan

Greater Khingan

The Greater Khingan Range , also called the Greater Hing'an Range or Greater Hinggan Range, is a volcanic mountain range in the northeastern part of the People's Republic of China. The range extends roughly 1,200 km from north to south, narrowing towards the south...

 Mountains and flows in a general eastern and south-eastern direction, parallel and southwest of the Amur, until falling into the Amur in Huma County

Huma County

Huma County is a county in the far north of the Heilongjiang province, People's Republic of China. The county seat is located on the right bank of the Amur River, a few kilometers upstream from the fall of the Huma River into the Amur.It is under the administration of the Da Hinggan Ling...

, at 51.617°N 126.697°E, about 10 km south of Huma County's county seat.

Somewhere near its mouth was the Russian fort of Kumarsk at the time of the Russian–Manchu border conflicts. At the time it was also called "Kamora River" or "Houmar River".