Trashigang, "The Jewel of the East", spans the easternmost corners of the kingdom, skirting up to the edge of the Indian state of Arunachal Pradesh. It is the country’s largest district, with an altitude ranging from 600 m to over 4000 m.
Bhutan’s largest river, Dangme Chhu, flows through this district. Trashigang town is set on a scenic hillside and was once a bustling trade centre for merchants looking to barter their goods in Tibet. Today, it is the junction of the East-West highway with road connections to Samdrup Jongkhar and the Indian state of Assam. Trashigang town is also the principle market place for the semi-nomadic people of Merak and Sakteng, whose unique way of dressing stands out from the ordinary Bhutanese Gho and Kira.
Trashigang is home to the Sakteng Wildlife Sanctuary. The Sakteng Wildlife Sanctuary, one of ten protected areas of Bhutan, was created in part to protect the migoi, a type of yeti, in whose existence most Bhutanese believe. The sanctuary covers the eastern third of the district (the gewogs of Merak and Sakteng), and is connected via biological corridor to Khaling Wildlife Sanctuary in Samdrup Jongkhar District to the south.