Sandstone hills within the park’s 4,708 acres are adorned in spring with more than 90 species of wildflowers, including the Diablo sunflower (Helianthella castanea), which grows only in the foothills of Mount Diablo. Deer, coyote and even the elusive mountain lion may be seen here, and a variety of raptors frequently soar overhead.
Expansive ridgetop views reveal Mount Diablo to the west, Mount St. Helena to the north and the snow-covered Sierra to the east. Lowland valleys cradle the headwaters of Marsh Creek.
Hours
Jan 1 through Jan 31: 8:00 am – 5:00 pm
Feb 1 through March 12: 8:00 am – 6:00 pm
March 13 through April 17: 8:00 am – 7 pm
April 18 – Sept 5: 8:00 am – 8:00 pm
Sept 6 through Nov 5: 8:00 am – 7:00 pm
Nov 6 through Dec 31: 8:00 am – 5:00 pm
