The Mongolian is an international train operating between Moscow and Ulan-Bator along the Trans-Mongolian rail route. The train runs once a week during the high season and once every 2 weeks during the low season (winter). The train has 1st and 2nd class compartments and a restaurant car. The train mainly consists of rather old but well-kept carriages which were produced in Germany over 20 years ago. These carriages are gradually being replaced with new ones.

First-class is a compartment with two lower berths on the same level. Second-class compartments are designed for four persons with two upper and two lower berths. There are 2 WCs per each carriage.
The train runs along Lake Baikal during the daytime giving its passengers an opportunity to enjoy the beautiful landscape. This train is unique because it is frequently filled with Russian and Mongolian traders with their goods. The police may also make more careful inspection of the compartments due to this high trade activity.