Brushy Peak, also known as Brushy Knob or Las Cuevas, is a summit in Alameda County, California that overlooks the Livermore Valley. North of the valley, it is part of the Diablo Range. It rises to an elevation of 1,686 feet and is the location of Brushy Peak Regional Preserve; there are guided tours to the peak itself. Historically, the peak and its immediate surroundings were used for some outdoor events, like picnics.