It is parallel to the latter and separated from it by the Moma-Selennyakh Depression, a wide intermontane basin, where the river Selennyakh flows and that continues southeastwards along the western side of the Moma Range.

To the northeast it connects with the Kyun-Tas, at the western end of the Polousny Range, and to the northwest with the far north of the Chersky mountain system.

[3] The highest point of the Selennyakh Range is the Saltag-Tas (Салтага-Тас), a 2,021 metres (6,631 ft) high ultra-prominent ridge located in the southern part, nearly 90 kilometres (56 mi) to the south of Deputatsky.

[4] Other subranges of the wider Selennyakh are the Nemkuchan Range in the northeast —a small ridge along the river of the same name facing the Kyun-Tas, the Esteriktyakh-Tas in the east, and the Tommot Massif and Andrey-Tas at the southern end.

The river valleys of the range have sparse larch forests, and above 600 metres (2,000 ft) there is a narrow pre-tundra belt in which alder and dwarf cedar predominate.