Trashigang is the eastern terminus of the Lateral Road, Bhutan's main highway leading to Phuntsholing in the southwest.

Trashigang Dzong was built in 1659 by Trongsa Penlop Minjur Tenpa and served for centuries as an administrative headquarters and monastery, though government offices mostly relocated by 2011.

Its sinking eastern foundation and crumbling upper walls necessitated either relocation or total destruction and reconstruction.

[3] Trashigang is the largest district in Bhutan and serves as the administrative seat for the Dzongkhag and a home for the monk body.

[1] It has three sub-districts and fifteen gewogs, which include Bartsham, Bidung, Kanglung, Kangpara, Khaling, Lumang, Merak, Phongmey, Radhi, Sakteng, Samkhar, Shongphu, Thrimshing, Udzorong, and Yangneer.