Baikal–Amur Mainline
The line currently has an official length of , branching from the Trans-Siberian railway at Bamovskaya station, near Skovorodino in Amur Oblast. The line continues north, joining the Baikal–Amur Mainline near Tynda and continuing along the BAM for before branching northwards at Bestuzhevo. The line in this section crosses the Gilyuy River twice. Shortly after entering the Sakha Republic, the line passes through the Nagorny tunnel under the Stanovoy Range.