From Ulan-Ude the Trans-Mongolian heads south to Ulaan-Baatar before making its way southeast to Beijing.
Glavna smer Transsibiske železnice se začne v Moskvi na postaji Yaroslavsky Vokzal, teče skozi Yaroslavl, Čeljabinsk, Omsk, Novosibirsk, Irkutsk, Ulan-Ude, Čita in Habarovsk do Vladivostoka prek južne Sibirije.