H&R Block stands as a straightforward yet rewarding trad climb situated on the rugged edges of Curly Shuffle Cliff, part of the dynamic Mammoth Lakes climbing scene. This single-pitch route rises sharply amidst classic Sierra Eastside terrain, offering climbers a direct encounter with blocky features and an inviting crack system that commands attentive footwork and solid protection skills. Approaching the route, you’ll find yourself navigating a rough but accessible trail that winds through open pines and granite outcrops, each step a prelude to the vertical challenge ahead. The climb itself moves confidently upward, requiring careful placement of gear up to 2.5 inches. Expect to pass a prominent block roughly halfway through the ascent — a distinct landmark that divides the climb’s rhythm and demands strategic movement and balance. The granite here is robust yet unpredictable, so deliberate holds and steady breathing pay dividends.

Though rated 5.10a, H&R Block sits toward the sharper edge of this grade, with a crux that tends to push climbers’ limits more than the rating might suggest at first glance. The short but punchy nature of the pitch makes it ideal for those wanting an efficient test of trad skills without committing to a multi-pitch adventure. Sunlight washes the face in the mid to late morning hours, enhancing friction and offering comfortable temperatures, while afternoon shadows bring cooling relief, perfect for warm-weather ascents.

Safety is critical: the block halfway up demands full attention, as it serves as both a natural anchor and a potential hazard for swinging falls. Gear placements feel secure with cams up to 2.5 inches, but climbers should be prepared for occasional spotty holes that require careful judgment. Mammoth Lakes' accessible wilderness setting provides breathtaking vistas and a sense of solitude uncommon in busier climbing hubs. Whether you’re sharpening crack technique or simply soaking in Sierra scenery, H&R Block delivers a compact climb with straightforward logistics and memorable moves.

The approach trail begins near The Stumps area and takes about 20 minutes, crossing uneven but clear terrain. Bring sturdy shoes, plenty of water, and a daypack light enough to stay nimble. The route’s limited length means you can fit it into a morning session before exploring other sectors of Curly Shuffle Cliff or deeper into California’s Eastern Sierra attractions.