99% Pure stands out on Observatory Rock’s South Fork wall as a straightforward yet satisfying trad climb that rewards steady effort and smart gear placement. The route begins at the same narrow slot as the Original Route but immediately veers left into a broad crack that stretches upward with a near-vertical incline. This crack is the heart of the climb, inviting climbers with its reassuring width and secure placements suited for mid to large-sized cams. Each move feels deliberate, demanding strong hand jams and a methodic approach to gear. After climbing 10 to 12 feet, the angle suddenly eases, giving a much-needed break as you approach a moderate runout stretching toward the lone tree crowning the finish.

The sensory experience here is elemental: the coarse granite under your fingers, the snap of cams sliding into perfect homes, and the ambient whisper of the canyon's breeze reminding you of the wilderness beyond the rock face. This climb balances risk and comfort seamlessly—while the runout approaching the top tree keeps you honest, the crack’s consistent protection opportunities keep that sense of safety intact.

For those seeking a classic 5.9 pitch in the Lyons, Colorado area that mixes solid crack climbing with accessible terrain, 99% Pure fits the bill. Its compact length makes it an ideal objective for a half-day trip, allowing time to soak in the canyon’s layered walls and the surrounding foothills. Observant climbers will appreciate the quiet solitude of the South Fork, where each exchange with the stone feels intimate and immediate.

Preparation is key for a smooth climb. Bringing several cam units, especially duplicates in the #2 and #3 Camalot range, is essential — they slot perfectly into the crack’s rhythm and provide the necessary security. The hike-in to Observatory Rock is moderate and well-marked, but gloves can help protect your hands from rough granite during placement and gripping. Early to mid-morning ascents offer the best light, with the south-facing wall warming up quickly but remaining shaded enough to keep you comfortable through the spring and fall.

After summiting, the descent back to the base involves a short walk-off that’s straightforward but requires focus—watch your footing on loose gravel to avoid slips. Unlike longer multi-pitch routes, this climb’s single pitch opens the door to sharing beta, swapping stories, and planning the next line in this accessible pocket of Colorado’s climbing landscape.