Administratively most of the range falls within the Penzhinsky District of Kamchatka Krai, but the western end reaches into the Severo-Evensky District of Magadan Oblast.

[3] The area of the Ichigem Range was first mapped by geographer and ethnologist Baron Gerhard von Maydell (1835–1894) during his pioneering research of East Siberia.

The Kolyma Mountains rise at the western limit of the range and the waterlogged lower Penzhina valley marks its eastern end.

[6] There are numerous vestiges of ancient glaciation in the Ichigem Range, but no modern glaciers.

River Oklan has its sources in Mount Stolovaya of the western part of the Ichigem and flows roughly eastwards along the southern limits of the range, beyond which rises the Oklan Plateau (Окланское плато).