View the stars from its lofty heights, bike ride to its 3,849 foot summit or explore the more remote trails by horseback. The park offers hiking, biking, horseback riding and camping. The rainy season is generally from November through mid-March. Visitors in the winter occasionally experience a snowfall on the mountain peak. Many visitors to Mount Diablo head straight for the summit to enjoy the famous view.
Summer days are sometimes hazy, and the best viewing is often on the day after a winter storm.
North and east of Mount Diablo the San Joaquin and Sacramento Rivers meet to form the twisting waterways of the Delta. To the east beyond Califomia's great central valley, the crest of the Sierra Nevada seems to float in space. The first half of the gentle 0.7-mile loop trail is accessible to visitors in wheelchairs. Pick up a copy of the trail Nature Guide at the trailhead. You'll find unusually large sandstone formations and small caves here.