Cave Route stands as a compelling challenge for anyone eager to explore some of the Bay Area’s oldest and most textured climbing lines. Situated within the Rock of Ages formation in Pine Canyon at Mount Diablo State Park, this route blends moderate sport climbing with a uniquely engaging finish that demands both technique and composure. The climb begins on a slabby face, inviting you to feel the subtle friction beneath your shoes and read the rock’s subtle features. As you ascend, the route curves around small caves carved into the granite, leading you up a striking streak of colorful mineral deposits that streaks the wall like a natural painting. Approaching the high grassy cave, you’ll find multiple options to build a solid anchor, yet pushing self-reliance on anchor building here speaks to the character of Pine Canyon itself. Instead of relying solely on fixed hardware, you’ll want to bring cams ranging from .75" to 2" to create custom protection in the shared heritage of this venerable climbing area.

The second pitch is a short but surprisingly fun addition. It threads through a narrow squeeze chimney, protected by two bolts, that tunnels through the back of the cave. This passage challenges you to find rhythm and control in a confined space, as the rock presses close but offers positive holds to propel you through the slot. Emerging from the back side of the Rock of Ages, you’ll find a natural belay spot just downhill where sitting anchors you firmly, a testament to the route’s old-school spirit. The absence of bolted anchors here sets Cave Route apart—some may hesitate at this reality, but many find it adds nuance and quality to the experience. This approach is typical for Pine Canyon, where bolts are sparingly used, especially for anchors, favoring natural protections and craft.

Expect excellent rock quality on this route, consistent with the best granite in the region. With two pitches covering approximately 140 feet, Cave Route fits well into a half-day outing. Accessibility from the San Francisco Bay Area makes it a convenient adventure, inviting climbers to escape the urban sprawl into a rugged world where every move counts.

Gear-wise, plan for 10 quickdraws and a modest rack of cams between .75" and 2" to cover anchor needs. Timing your climb in spring through fall is wise, as the granite warms in the sun and dry conditions prevail. Approaches from the main trailhead are straightforward but require attention to detail to locate the subtle trail leading to the base.

This climb offers a balanced blend of mental intrigue and physical engagement, rewarded with sweeping views of the surrounding landscape. The challenge is clear and approachable, making the Cave Route ideal for climbers who appreciate history, quality rock, and a bit of old-school ingenuity. Whether pushing your limits or enjoying a solid moderate route, Cave Route promises a memorable connection with the mountain’s enduring spirit.