Entry and exit points are at Zamyn Uud in the south of the country and Altanbulag in the north. If you enter on foot, you will be able to obtain a tourist or transit visa at the border. You will need your passport and a passport-size photograph to enable you to do this. You will not require a letter of invitation. However, because so few people choose to use this route to enter Mongolia, you are advised to get a visa and letter of invitation in advance.
Special conditions apply to Russian and Chinese citizens.
If visitors wish to cross the borders by horse, car, motorcycle or other means, they will need to obtain permission for their mode of transport in advance. They will need to write to the Visa and Passport Division of the Ministry of External Relations in Ulaanbaatar. Leaving Mongolia Visitors wishing to leave Mongolia must obtain onward visas before doing so. For example, you will not be able to leave the country by train through Moscow, unless you have obtained a Russian visa. The same applies for all modes of transport and all border points.