| Mama | |
| Source1: | Confluence of Left Mama and Right Mama |
| Source1 Coordinates: | 57.1847°N 111.3914°W |
| Source1 Elevation: | 439m (1,440feet) |
| Mouth: | Vitim |
| Mouth Coordinates: | 58.3075°N 112.9219°W |
| Mouth Elevation: | 209m (686feet) |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 211km (131miles) |
| Discharge1 Avg: | 350m3/s |
| Basin Size: | 18900km2 |
| Pushpin Map: | Russia Irkutsk Oblast |
| Pushpin Map Caption: | Mouth location in Irkutsk Oblast, Russia |
The Mama (Russian: Мама) is a river in Irkutsk Oblast and Buryatia, Russia. It is a left tributary of the Vitim, the second largest in basin area after the Tsipa. The river has a length of 211km (131miles) and a drainage basin of . The total length of the river including the Left Mama is 406km (252miles).
The Mamsko-Chuysky District of Irkutsk Oblast is named after rivers Mama and Chuya. The settlements of Bramya, Slyudyanka, Lugovsky, Zarya and Mama are located by the river.
The river basin is located on the slopes and foothills of the Upper Angara Range. Rivers Left Mama (Levaya Mama) and Right Mama (Pravaya Mama), which form the Mama river, have their sources in the heights of the range, at 1720m (5,640feet) the first and at about 1900m (6,200feet) the second. They are fast-flowing mountain rivers, with rapids and waterfalls. After the confluence the Mama flows roughly northeastwards across a fragmented floodplain slightly meandering among rocky banks. The river is navigable downstream from the confluence of the Bramya, a small tributary. Finally the Mama meets the lower course of the Vitim 171km (106miles) from its mouth in the Lena.[1]
The river is located in an area marked by permafrost. Most of the territory adjacent to the river is covered by larch taiga and Siberian pine in the upper reaches, crowned by golets bare summits. The main tributaries of the Mama are the 153km (95miles) long Konkudera, the 48km (30miles) long Kaverga and the 40km (30miles) long Bolshoi Ugli.