The Hohgrat, also known as Grat, is a mountain located on the border between the Swiss cantons of Thurgau (municipality of Fischingen) and St. Gallen (municipality of Mosnang, Toggenburg). Reaching a height of above sea level, it is the highest point of the canton of Thurgau.
The mountain is densely forested, except the eastern (St. Gallen) side, which includes some limestone cliffs.