Trashigang lies above the Gumri river and is the largest district in Bhutan. It is much busier than other Bhutanese towns due to its proximity to Samdrup Jongkhar in the south has enabled it to grow as a centre of commerce. Trashigang is used as the market place for the hill people from Merak & Sakteng who are known for their exceptional features and for their costume made of Sheep skin and Yak wool. The hat that they wear is unusual but has a significance of its own. It is very different from customary Bhutanese clothing. The 17th century Dzong is built on top of a cliff and serves as an administrative centre.

Tashi Yangtse: formerly a subdivision of Trashigang is one of the new districts. Yangtse Dzong is half an hour walk from the road. A town has developed around Chorten Kora, one of only two chortens built in a Nepalese style and a spot where Guru Padmasambhava is believed to have had a vision that a temple and a chorten would be built. The area is also known for its exceptional woodcraft. Another temple lies on the banks of the Gumri river known as the Gom Kora dedicated to Guru Padmasambhava where he supposed to have subdued a demon in form of a Garuda. A festival takes place every year at this temple.