Hayley Anna offers climbers a focused experience on one of Parkline Slab’s best pure jam cracks, set deep within the iconic Lower Merced River Canyon of Yosemite Valley. This route invites you into a physical dialogue with the rock, where every movement demands precise jamming technique and thoughtful body placement. Beginning with delicate finger jams that quickly give way to solid hand jams, the climb challenges grip and flow as you trace a subtle leftward traverse beneath a small roof. From there, the crack widens to accommodate big hands and fists, testing your power and endurance as you push toward the anchor.

The granite here feels alive, responding sharply to your balance and commitment. The crack's changing widths produce a rhythm that’s both exacting and rewarding—a chance to sharpen crack skills away from the crowds that swarm Yosemite’s most famous walls. This single-pitch route grades at 5.8 but rewards with hands-on, technical climbing that’s far from straightforward. Protection is straightforward, relying on cams up to #4 Camalot, with special emphasis on extra hand and fist-sized pieces for secure placements around the roof section.

Parking and approach are convenient yet contemplative. A short hike through open granite slabs leads you to Parkline Slab’s base, with GPS coordinates ensuring no wrong turns. Early morning or late afternoon provides the best light and temperatures, as the wall faces east and avoids the harsh midday sun, making it ideal for those looking to climb in cooler conditions during the warmer months.

Climbers should pack light but carry a full rack with emphasis on mid-sized cams to large pieces for solid protection. Footwear with sticky rubber is essential to navigate the slabby feet outside the crack. Hydration management is crucial, especially on warmer days, as there is little shade on approach and minimal opportunities to refill water en route.

Descend with care by rappelling from a solid anchor at the top. The rappel is straightforward but requires attention—loose rocks can be present near the landing zone, so helmet use is advised. The route’s modest length makes it a perfect warm-up climb or a rewarding standalone goal for crack enthusiasts seeking something authentic and less populated in Yosemite.

Hayley Anna stands as a reminder that sometimes the simplest lines demand the most respect and focus. It pushes climbers to engage fully with their technique and gear choices, delivering a pure jam crack experience that remains accessible but never easy.