This approach to Tsetseegün from the south side is the easiest route by far. As you face the monastery, cut over to your right (east) until you get to the stream. Just follow the stream until it nearly disappears and then head north. About three hours' walking should bring you out over a ridge into a broad boggy meadow, which you'll have to cross. If you've walked straight to the north, the twin rocky outcrops of the summit should be right in front of you.

When you start to see Ulaanbaatar in the distance, you're on the highest ridge and close to the two large ovoo (a shamanistic pyramid-shaped collection of stones as an offering to the gods) on the summit (GPS: N47° 48.506', E107° 00.165'). From the ovoo you can return to Mandshir or descend to Ulaanbaatar. A second route from the monastery begins from the left (west) side of the temples, passing a stupa on the way up to the ridge. This route, marked with yellow tags, is faster but you'll miss the ovoo on Tsetseegün.

Coming down from Tsetseegün the quickest way is to head due north, towards the Observatory and descend to the valley where you'll cross the train tracks. The road is close by and you can catch a taxi to town for around Tug3500. A longer route takes you to the Zaisan Memorial, on the southern fringe of the city. Be careful not to drop down too soon or you'll end up at Ikh Tenger, one valley short of Zaisan. Ikh Tenger is where the president lives with machine gun-wielding guards, who will be none too pleased if you drop by unannounced. If you see a flimsy barbed wire fence you are in Ikh Tenger; to get out, just continue west along the fence and over the next ridge.