What is a characteristic of Howell Mountain's vineyard elevation?

Howell Mountain is notable for its vineyard elevation, which typically begins at around 1400 feet above sea level. This elevation plays a crucial role in the climate and grape growing conditions of the region. At this altitude, the vineyards benefit from cooler temperatures compared to lower elevations, which can enhance the quality of the grapes by promoting slower ripening and allowing for greater flavor concentration. The elevation also typically allows for better drainage and less disease pressure, contributing to the unique character of the wines produced in Howell Mountain.

While some vineyards do exist at higher elevations, and it's true that the region includes slopes that rise well above 1400 feet, the defining characteristic that specifically marks the start of Howell Mountain's vineyards is indeed around 1400 feet, making this the accurate answer to the question.