Tashigang is a small village close to Tibetan border. Actually if one heads couple of kms farther from Tashigang to Somang (Tso Mang in Tibetan), one can see the Tibetan plateau, or so we were told. Somang is an important Buddhist pilgrimage site. It is believed that Guru Padmasambhava meditated in the caves around Somang Monastery and one can see his footprints there. But trek to Somang requires at least 2 days, and we wanted to get back to Nako by evening, so decided to go up to Tashigang only.So next day, early morning we started climbing the trail out of Nako, from an altitude of ~3600 m. (I don't have exact numbers, but the max altitude on this hike shouldn't be more than 3900 m.) For half an hour or so, this was a steep climb, and we ran into herd of sheep causing traffic jam on trail.