Merchimden
The Merchimden is a river in Yakutia, Russia. It is a tributary of the Olenyok with a length of and a drainage basin area of.
The river flows north of the Arctic Circle across a lonely, desolate area of Olenyoksky District devoid of settlements.
Course
The Merchimden originates in the eastern fringes of the Central Siberian Plateau, very near the sources of the east-flowing Motorchuna. The river flows initially to the northeast, then roughly northwards all along its course, parallel to the Olenyok flowing in the same direction a little further to the west. In its last stretch it meanders very strongly. Finally it meets the right bank of the Olenyok from its mouth. The confluence is just a little downstream from a very strong eastward bend of the Olenyok. There are a few small lakes just east of the confluence.The river is frozen between the first half of October and early June.