Mount Diablo State Park

A reasonably well appointed state park campsite near the top of Mount Diablo, this particular campground on the mountain hosts expansive views of the underlying valley and - on a clear day - you can see the highest points of the East Bay / Berkeley Hills and Marin County's Mount Tamalpais to the west, Santa Clara County's Mount Hamilton to the south, and the northern reaches of the San Francisco Bay.

During my stay, the bathrooms and showers were clean. Please note that some years during late summer / early fall water may be unavailable at this elevation on the mountainside due to drought conditions. Be sure to confirm with state park staff when booking. On this topic, campsites can become a bit dusty in late-season dry weather.

Springtime camping is quite verdant with rainstorms and even some rare light snow at the higher elevations. Summer and fall sunrises and sunsets highlight the golden slopes of grassy plains covering most of the mountainside.

Pull in sites are quite small as there is limited space for parking / trailers on this part of the mountain. I recommend asking park staff if the lower elevation (but still spectacular) Live Oak campground is a better fit. Regardless, check ahead with park staff if you are planning on bringing an RV or trailer. The drive from the south and north gates are quite long and somewhat steep. Give yourself about 30+ minutes to drive from the entrance to campsites or the summit, and be sure to go slow as there are often more hikers and cyclists than motor vehicles on the park roads at any given time.

The visitor center at the mountain peak is a must visit, but don't overlook the many hiking and cycling trails around the mountain. I highly recommend the (very) steep, but beautiful, Mitchell Canyon cycling and hiking trail that leads towards the base of the northern face of the mountain and of course the Juniper Trail to the summit.

Wonderful place for hiking and taking in the views of the SF Bay Area. Difficult road (steep, narrow, very winding), but for smaller rigs that might be an advantage: better campsite availability!
Most of the campsites in the Juniper campground are not level, except for the sites for disabled. Some are unusable for an RV because they are so steeply graded. Read the notes carefully before you reserve and be sure to bring your leveling stuff.
The only real complaint we have is the showers in the Juniper Campground. They were filthy to the point we would not use them! It's a real pity because they are very nice facilities--relatively new and well constructed. Shame on the campground managers for not having them cleaned.

Mt Diablo is fun to visit, but at the same time - beware of the desert summer heat. Be sure to do the hike around the mountain but bring lots of water.

At Juniper campground, you can see views of the ENTIRE SF bay from the outside eastern-facing sites and the parking lot has a nice place to lounge and watch dreamy sunsets/clouds coming in. Would stay again just for these views.

Site has a lot of spots and seems to sometimes have availability online. Bathrooms and showers.