The Bear Gulch Cave has two sections, with the lower section usually open for about 10 months of the year, and the upper section closed most of the time to …
Nice hike, especially when it's hot, this part is a little more shadowed. Flashlight strongly recommended. May be seasonally closed, see Park's website in advance.
Water, wind, and calcite erosion in per-volcanic sandstone formation.
Slightly acidic rainwater seeps into the sandstone during winter rains and dissolves some of the calcite. Warm and dry days cause …
This well-maintained trail offers fantastic views of the San Francisco Bay, Mount Diablo, the Livermore Valley and the Sacramento River Delta. In the spring, many wildflowers bloom on the green …
This is one of the easiest waterfalls to visit, particularly considering it's located near the rugged Sespe Wilderness. "Easy" being a relative term depending on how far you traveled to …
The Oregon Caves Visitor Center is open from spring through fall. It offers cave tour ticket sales, information, exhibits on the Oregon Caves and Siskiyou Mountains, Junior Ranger programs, and …
The Wind Caves are part of an area called Rock City in the Mount Diablo State Park. The Wind Caves are unique sandstone caves and tunnels that were formed by …
Named for its impressive group of three closely situated monoliths, two land-based and one rising from the sea, this state park features a short trail leading to the beach with …
The origin of this unusual little underground dwelling is unknown. You can see a round stovepipe hole, a square skylight, and a shelf opening from the interior.
This unusual little underground dwelling's origin is unknown. From the interior, you can see a round stovepipe hole, a square skylight and a shelf opening.