A high valley (German: Hochtal) is a valley in the upper third of a mountain range. More loosely it can refer to any mountain valley.
Examples of high valleys are the Kathmandu Valley in the Himalayas at a height of 1,350 m, the Engadine and St. Moritz in the Swiss Alps at 1,856 metres and the Tannheimer Tal in Austria at 1,100 metres above sea level.