From South Korea

Planning your ideal trip to Mongolia, while often time-consuming, is incredibly rewarding and fun. The secret to a successful trip itinerary lies in careful methodical planning which anyone can achieve, however daunting the prospect may seem at first. There can be a myriad of questions that arise regarding what to do and in which order, stemming from how to juggle bookings and where to even start. When travel planning to Mongolia is done right, the whole process is smooth and seamless.

Getting to Mongolia 

The biggest border points are road & train crossing to China at Zamin Uud, the road crossings to Russia at Altanbulag and the train crossing to Russia at Sukhbaatar.
Others are the road crossing to China at Bulgan in the west, the road crossing to China at Bichigt in the southeast, the road crossing to Russia at Tsagaannuur in the far west, and Ereen-Tsav in the northeast and the road crossing to Russia at Khankh in the north.