Common Denominator offers a focused trad climbing experience carved into the heart of Boulder Canyon’s Three Dihedrals area. This single-pitch route stretches roughly 100 feet along a steady low-angle slab that demands both attentive gear placement and smooth movement. From the moment you arrive on the ledge beneath the face—just shy of the larger Curvilinear route—the granite invites a hands-on approach across a modest but engaging landscape. The climb begins with a deceptively simple slab ascent to an intermediate stance, where climbers can choose to belay and absorb the quiet energy of the canyon.

Soon after, the line follows a clean, 2-inch crack that trends rightward, leading to the base of a sharp arete. This section asks for precision and calm as you navigate a mix of bolts and traditional gear placements, with five well-spaced bolts supporting a handful of essential pro slots between 1 and 3 inches. Despite the bolts, the need for reliable gear placement keeps climbers alert, adding a grounded sense of responsibility to the route’s measured exposure.

The arete and face just left of it offer tactical holds and subtle rests, balancing the physical effort with mental focus. At the summit, a two-bolt anchor fitted with rings stands ready for a controlled and confident lowering. This pitch rewards climbers with clear views of Boulder Canyon’s raw granite walls and the shaded greenery offsetting the stony terrain.

The approach is straightforward yet layered with subtle choices. Taking the left fork toward The Horse and The Tower, then veering onto a distinct trail toward The Clipboard, the path winds through forested steps and ledges with crisp footing. Fifteen to twenty minutes from the trailhead, the platform beneath Three Dihedrals presents a quiet place to prepare and soak in your surroundings before climbing.

Gear selection is key here—a medium rack focused on 1 to 3-inch cams will cover the protection slots without excess weight. The bolt placements ease some of the protection burden, but attention to pro remains essential for safety. This route shines as a clear, practical introduction to Boulder Canyon’s approach to trad climbing—accessible yet requiring deliberate movement and solid route-finding skills.

Timing your climb for morning to midday will find the slab bathed in sunlight while keeping the base shaded and cool. Avoid the hotter afternoon hours when the granite can heat sharply. Descending happens by a simple rappel from the fixed anchors, making retreats straightforward yet still requiring care — especially as the chains sit just atop a ledge.

Common Denominator suits climbers looking to test their trad skills on a concise route that blends manageable length with technical demands. Its setting in one of Colorado’s prime climbing areas adds a layer of natural beauty that frames every move, keeping the focus on the rock and the rhythm of the climb. Expect a deeply satisfying experience that calls on smart protection choices, steady climbing, and appreciation of Boulder Canyon’s rugged charm.