High-mountain (Gaoshan)
Definition
Tea grown above 1,000 meters elevation, primarily in Taiwan but also in parts of China and Nepal. High-altitude conditions - cooler temperatures, frequent fog, intense UV, and greater day-night temperature swings - slow leaf growth and concentrate flavor compounds.
Why it matters
High-mountain teas are prized for their distinctive creamy sweetness, floral aroma, and lack of astringency. Altitude is one of the most reliable predictors of tea quality and price in the oolong world - the higher the garden, the more you'll pay, and usually the better the tea.