Peak Season: Mid-March to late April/May
The state park surrounding this 3,849-foot peak about 40 miles east of San Francisco usually see blooms beginning in early March, sometimes lasting into May. Choose from a variety of hiking trails to see blue skullcap, Fendler’s meadow-rue, sanicula, Johnny-jump-ups, bush lupine, monkey flowers, globe lilies, California poppies, bird’s eyes, and wallflowers. Throughout the season, volunteer “Flower Finders” update a Google Drive document with blooms they’ve seen on the mountain.
Updated on 04/30/20: Mount Diablo State Park will remain open only to hikers, bikers, and equestrians. All roads and parking areas in and around the State Park are now closed to all vehicles. All park visitors must distance themselves from others by the required 6 feet. Restrooms remain open but you must provide your own soap. The Summit Visitor Center & Mitchell Canyon Visitor Center remain closed as do all campsites.